Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e408ad1104bb540…

MALICIOUS

PDF

64.3 KB Created: 2021-02-25 14:08:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0faa47086cd5bbd15e5169011a1abaf5 SHA-1: 961528664a71e3d21f39ef54fd8bbfdd465752d5 SHA-256: 2e408ad1104bb540930e9c02605ba5d972d8ec51a1148f3d72034b018b296c8a
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to PDFs hosted on various domains, suggesting a link farm designed to distribute malicious content. The primary URL appears to be a search result lure for a popular game rulebook, intended to trick users into downloading the malware.

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://seumenha.ru/wb?keyword=warhammer%2040k%207th%20edition%20rulebook%20pdf PDF link annotation
    • https://cdn.sqhk.co/burajugi/cOuEge3/ratosokununubejiwopar.pdfIn PDF document text
    • https://jupimoxojufe.weebly.com/uploads/1/3/4/8/134860775/94a2b45651af27.pdfIn PDF document text
    • https://mijutadozas.weebly.com/uploads/1/3/4/5/134590660/134b71629fb75d.pdfIn PDF document text
    • http://sizegivip.22web.org/xaninobatekofeva.pdfIn PDF document text
    • https://degupapaji.weebly.com/uploads/1/3/0/8/130814014/4b01e7e757d7d.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/nafofamavoger_kijijobaf_nevafoluv_getavonudoz.pdfIn PDF document text
    • https://lemuwepino.weebly.com/uploads/1/3/2/7/132712354/04ffa8c9d9910.pdfIn PDF document text
    • https://serirufudo.weebly.com/uploads/1/3/4/7/134712976/9d5f884f.pdfIn PDF document text
    • https://xaxexuwolak.weebly.com/uploads/1/3/5/9/135978614/jutusedezalimu.pdfIn PDF document text
    • http://sipebep.22web.org/android_wireless_file_transfer_windows_10.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/rubidokezive/64025378162.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/can_i_use_skin_so_soft_bug_guard_on_my_dog.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/what_text_structure_uses_as_a_result.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/48529508767.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_off0000c063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC063 5628 bytes
SHA-256: 3b4474e93f956a12a4e3214c0a8dcd6aa7609f588951e4d4d532567f7ce19f01
font_01_sfnt_off0000d36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36F 9564 bytes
SHA-256: 252f4e1c42bf91ae1a3283dcd62dd23241d7cf1ef3d8c726a47040741d596ad3

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