Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ce894e66387456…

MALICIOUS

PDF

136.7 KB Created: 2021-08-14 19:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3bb301b616fbe69df09471daced7fcec SHA-1: 4b8c82101cfa9ed6e3b2eaffb55b0a0a3247aceb SHA-256: 18ce894e6638745660b7ad99671daa94201de1f7a4097e31def2642a38ecfd5d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF that contains multiple links to other PDFs hosted on compromised websites, indicating a link farm for SEO poisoning or phishing. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document's purpose is to trick the user into downloading a password-protected archive, likely to bypass gateway scanning. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9497

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/4d7bad51d534eaa54f2bdcae17da33ad/93003398254.pdf In PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/kojuveminetakilixogi.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/9baa8uaa58n6bmo8iq2njelq0e/wemajugodabejufipifipitiz.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/wujoborow.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/63975144043.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/71139900912.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/82351592772.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092025e2ce77---naferaf.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/b6fb30cc0cc87d0e1e8b20407c5952b2/75948750969.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/jomiravorowobe.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/pimakejefelazusazavovaw.pdfIn PDF document text
    • http://quaint-house.com/images/blog//file/89524011406.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/1qpuadmkm0fut80rn72ricuqql/xitikolugun.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb46f8061dc---robugixarala.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765e796ce8f---56359361947.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/d4dbc480c11eaf71d79b15e84c4189d7/mekowizugupumizati.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/29801523416.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607102e64fe83---89780794683.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16073850225714---97144112388.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/d0cae069b34717cc5f4d9ba120f6c98c/nepefadatowemodivasizi.pdfIn PDF document text
    • http://txextremecarts.com/userfiles/file/joxolezikemoko.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed7db492c6---gofenakoduxamizajagi.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/59838154590.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/89467847565.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebc92792e7---wusodenepevu.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/1e4d47b5fe6637a2f17f7e45c0b2e56c/10092907820.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=nonton+film+avatar+the+legend+of+aang+subtitle+indonesia+full+episodePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001bde1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1BDE1 29124 bytes
SHA-256: de59a5703aa3e782f381ccd4df188bc0ce3fce637d127e3a8a6e43dd79a2d9c8
font_00_sfnt_off000165d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165D4 11228 bytes
SHA-256: 9de3bdfec6a906b6d72f3a93a1879defcf9e8f7ceffdad3a20f1e1a7bcc44207
font_01_sfnt_off00017f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F7D 24944 bytes
SHA-256: a7aff4cf9e8d76a3742c46ec0dfae83a5a76e4fd707d4577337fc67e9a29503a
font_03_sfnt_off0001f1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F1D5 1888 bytes
SHA-256: 8843761473eddf0f356c70227ec74b3c55fdeb67197b19bec339d45b3f917988
font_04_sfnt_off0001faa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FAA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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