Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9f7afd6a9eb17f…

MALICIOUS

PDF

76.6 KB Created: 2021-01-11 05:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b06d86acefbb4e33b98548608933968e SHA-1: acaa4636af8e772952222faf94843429b75ea385 SHA-256: fe9f7afd6a9eb17f55511000f80ec41c0691ffc65a125cf689c02cd43ab03c74
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain. ClamAV and ML heuristics identify this PDF as malicious, likely a phishing or trojan delivery mechanism. The presence of embedded links suggests an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafficel.ru/aws?utm_term=glory+to+arstotzka+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489988/normal_5fb491cb72e53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465539/normal_5fc49642301fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445107/normal_5fa10b7232f62.pdfIn PDF document text
    • https://cdn.sqhk.co/xojurolaruk/Ouhehf0/husqvarna_automower_connect_home_bluetooth.pdfIn PDF document text
    • https://cdn.sqhk.co/bumadawab/JpvXhgY/rosolopokuju.pdfIn PDF document text
    • https://raxugujelagad.weebly.com/uploads/1/3/4/1/134108814/ramir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420907/normal_5ffa1f619cee5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419630/normal_5fbab8cfaa360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468534/normal_5fe7d8c09c618.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tiniruru/free_printable_worksheets_on_animal_classification.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/jufagesanu.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/66049717621.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/fifa_15_mod_apk.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18E 5100 bytes
SHA-256: 9f6816682e312ea5001d0e900ff7aa5876a4bcabc4272bd73b3db105b2da23c2
font_01_sfnt_off0000f30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30C 2764 bytes
SHA-256: 7d834063bb4963c86909cfe0b22b8f7ef49b2cbedb447bd6f6354b433d0d6572
font_02_sfnt_off0000fed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED6 10912 bytes
SHA-256: 3425badfd1d26d6f2163bb2e460bfa90fe4c5a10224a1e25fbb8e564e189d413

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