Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a41934f2f93a9c2…

MALICIOUS

PDF

70.5 KB Created: 2021-03-04 20:10:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ad4b48b0b7e9ffaa6f31934511a9eed4 SHA-1: 168bd49e64655ba201e7fc000e11d333de92bad5 SHA-256: 9a41934f2f93a9c2a0a3a76e90c5d2e8e62957a10e5ac0a38a07fe10e6139dad
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=toro+51480a+trimmer+head PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410018/normal_600bec055a216.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374371/normal_5ff14985c9aab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484812/normal_600e082c10530.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371272/normal_5feea112b45c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386851/normal_601e7668d18a0.pdfIn PDF document text
    • https://cdn.sqhk.co/rexukewanej/eJibgep/grow_idle_archer_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_5fd11286e83f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381532/normal_5ffcadbe07a0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_6032060a1574d.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/pKgdhbY/dawavipurufoxopelu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_603e1965d32ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387235/normal_6000fc5f9cd0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420764/normal_6000052b0d884.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387420/normal_5ff01147c97f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483586/normal_600206658c094.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475586/normal_5fdeecd35a503.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba738def-936a-466d-b6e3-ae4869a34f69/giropijisabe.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_6e288b26338a40f8b7c7b1fc8bbfc7c4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/001ff678-9ad1-4af2-8e94-18aed5fe58c1/58555963427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8e804e-9377-4fb5-b022-2b18a6e00f8b/66699708941.pdfIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_b7daeff24bb943ce99eaf7e54c427ec0.pdf?index=trueIn PDF document text
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_9675b1d0af2f432ca8c9e3a75210868f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/170974d0-6627-45bb-86d5-fb3432d703a1/evenflo_tribute_sport_convertible_car_seat.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

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD831 5404 bytes
SHA-256: 23a9986d2ab3262fcdc96845fbbcb060da37eb9e118aa405feadc213828b7e10
font_01_sfnt_off0000ea70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA70 10068 bytes
SHA-256: 2f9548b8e591d5e5217bb940c6159e5e7a96795e7aeaa003c379c695d35e1282

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