Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb65ca115f968705…

MALICIOUS

PDF

116.5 KB Created: 2021-01-02 11:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 02649750eca33776a9e397d1f7e9ca32 SHA-1: 376d1da5884860b6d0f5fa5efe078e5ee886c14f SHA-256: bb65ca115f968705b76988ddd48ed84589c5aa774a55274df1ab1c5f4dfa0efe
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF contains numerous external links, indicative of a link farm or phishing attempt. The 'Browser extension / update installation lure' heuristic strongly suggests the document's purpose is to trick the user into installing malicious software or providing credentials. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 https://trafffi.ru/123?utm_term=scanner+sdk+c%2523 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475992/normal_5fc988d1a3391.pdfIn PDF document text
    • https://cdn.sqhk.co/nezafomura/japd0hb/call_of_duty_2_cheats_for_xbox_360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488580/normal_5fb7486555fc7.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/pthgief/kupuxemajirezabomugetu.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/jhfJVPT/92158641490.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/5jheUEi/fallout_shelters_near_me_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419645/normal_5fc7ca3707d72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_5feaf3899983c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_5fa5dfea22e08.pdfIn PDF document text
    • https://vujedivu.weebly.com/uploads/1/3/4/7/134768767/6c9daeacf3.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/woxojuxafopuv/29070104910.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/7987395187.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18427 5068 bytes
SHA-256: ce7e36339c9fab98ca247afd9a766cbf3a8e84759dd063ea12dd3a89b9f321b3
font_01_sfnt_off00019575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19575 15108 bytes
SHA-256: a7922ec0563bfbd30a6fa32743248aba759ada05a142567f1d8004f65046d826

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