Malicious PDF — malware analysis report

Static analysis result for SHA-256 94041128151fae49…

MALICIOUS

PDF

89.1 KB Created: 2021-07-31 03:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: caa54e141e2aada25887ba091ae1cd72 SHA-1: 70b0f6aa3f41d9c3bfe1f44cf683f5352d42b06f SHA-256: 94041128151fae4987c86c0db4e7dc40ddd5f203c1d8f7132f4a265de5fb30d2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/k41o03hrspdmie5ljo07h4f6qv/nifimutexejiwofubew.pdf In PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/038d3682316e9ee64f09ad04cdcc3fb6/fiwisadonitibuririju.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4ff9c9c71---61784821600.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/luzudulazivasejit.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/zonuperetamirebujuban.pdfIn PDF document text
    • http://abpaluso.com/upload/file/xesijusiwenojudokeboliwak.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/tipara.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210526172156_1978756589.pdfIn PDF document text
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/ojctthgc57r9eh1mad2ol12voa/nebowumozarunex.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/meboviwezipopuvopufewup.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/m8teq85tuka0hhkrn7q3gk1a0g/16087738688.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a51a8dbb778---vexifuzexudoreve.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/91554857537.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/sunobe.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610314bd1c362---xovonige.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/bba54760a0d412873ece4270e1dac49c/95422309780.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44c5a95d27---14936586990.pdfIn PDF document text
    • https://gomaihoa.net/upload/files/tosasuzudate.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/5ff00405b9d36ef5e10c1123e141cf06/85034069585.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/nesamefuzoju.pdfIn PDF document text
    • https://primer-spb.ru/files/files/fuwid.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/c9737a305734aabce9a7a70a689ae70a/xupaxopu.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/luzawe.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/13921108276.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=final+destination+7+full+movie+free+downloadPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E2 16904 bytes
SHA-256: 648db4a848089d3b17ca8d8fb8f3dd85eecc256b362b917d51490640fcfd75c0
font_02_sfnt_off00013d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D03 10792 bytes
SHA-256: f6a9232c0927d27cdeca2c16a063ded4a65fdcd59c849e36577bf0501c24e544

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