Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18172970cc26f87…

MALICIOUS

PDF

73.0 KB Created: 2021-09-20 19:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a9fdb9438d4326d646309dc8b2542bd9 SHA-1: a16eba749d776b1f7fff1ae54e783e5e13791085 SHA-256: c18172970cc26f871ebcaa6536cbc0db6263659354fe802124732062e95e45c1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 http://kleinschaden-expert.de/userfiles/file/56457840302.pdf In PDF document text
    • http://skpizzasubs.com/uploads/files/ralet.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/47256847339.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/55256692190.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/gotutupokovodupuvudima.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba17b2671a---misubureretoritafo.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/xakobuxulotipino.pdfIn PDF document text
    • http://chemsdano.com/upload/files/40963083654.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/2556715856.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/padufagokuze.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff12a96f9b---mivozawuxewet.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/saturibukirasabojugumi.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/fosidakijizu.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/7sftce5vmdu0eb000n1sfl674c/29206663363.pdfIn PDF document text
    • http://citty.org/images/uploads/file/10752045828.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/84355227989.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/78077187333.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/pavokesixotusofabizajabi.pdfIn PDF document text
    • https://haisanquangninh.org/data/dulieu/files/wamibusuwe.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/muvavelimiroje.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/59883341382.pdfIn PDF document text
    • http://cjatkinson.com/userimages/mafuxufejepox.pdfIn PDF document text
    • http://corkpotters.com/images/5714945080.pdfIn PDF document text
    • https://dacola.com/upload/files/81475983722.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=black+desert+kr+apkPDF 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_off0000b9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E9 17596 bytes
SHA-256: d3bd612221dbfac81be1c075788db0a4e6522ffcf7ec1060b21b12cd2a8ef7bf
font_01_sfnt_off0000e728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE728 10336 bytes
SHA-256: 4b3aef0a2d2e7e2eb588f06cd1e6c234ee4dd5ac5658aa70d57ff04850de261f
font_02_sfnt_off0000fead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.