Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dfafd08acf075ad…

MALICIOUS

PDF

76.3 KB Created: 2021-06-03 10:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 766eed1db7dfd9cdef1368c9206714e6 SHA-1: 20aaac54157f78dfbb0a54a562ad9622e9dd3184 SHA-256: 2dfafd08acf075adcf10b807e9e4245bbccebe98983ec9dd0e6fcd5bdb44366f
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for distributing further malware or leading users to phishing sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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.
  • 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://crewmak.ru/pbw?utm_term=sheet+music+bohemian+rhapsody+piano+free PDF link annotation
    • https://pebabozepevi.weebly.com/uploads/1/3/5/9/135966679/sexojofagure.pdfIn PDF document text
    • https://mesemexuganu.weebly.com/uploads/1/3/1/4/131437531/3684277.pdfIn PDF document text
    • https://litefobobufi.weebly.com/uploads/1/3/5/3/135326689/68dd6db26ce8b33.pdfIn PDF document text
    • https://wimavebitajiki.weebly.com/uploads/1/3/4/6/134609796/lezojemesu.pdfIn PDF document text
    • https://rovonowevon.weebly.com/uploads/1/3/6/0/136051941/vixeboxa-sapipasumis.pdfIn PDF document text
    • https://letenusesek.weebly.com/uploads/1/3/4/3/134310332/ravorikuxefomesojew.pdfIn PDF document text
    • https://dipediras.weebly.com/uploads/1/3/0/7/130739778/wekija_xebululak_vajanoginudaler.pdfIn PDF document text
    • https://pazixexawa.weebly.com/uploads/1/3/1/4/131437352/zavutowariv.pdfIn PDF document text
    • https://jitedutakawu.weebly.com/uploads/1/3/4/7/134712839/8979546.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380070/normal_5ffab6003b8c9.pdfIn PDF document text
    • https://xefakiradu.weebly.com/uploads/1/3/1/8/131856624/6152747.pdfIn PDF document text
    • https://noxajigaja.weebly.com/uploads/1/3/4/6/134698193/1331204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486751/normal_5ffe0ebe6e081.pdfIn PDF document text
    • https://fuwidomanajano.weebly.com/uploads/1/3/0/8/130874101/nixukipemuzej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490376/normal_603a6bacf03f5.pdfIn PDF document text
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/gezefi-vatikad-pamotiw-wajinelutepero.pdfIn PDF document text
    • https://tobapedez.weebly.com/uploads/1/3/5/3/135344168/limul.pdfIn PDF document text
    • https://wiwanozamo.weebly.com/uploads/1/3/4/3/134306351/5348664.pdfIn PDF document text
    • https://peretugi.weebly.com/uploads/1/3/0/7/130739140/vesoxe-xixomomaponanet-xafizor.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/893a6719-ff4e-49d7-828c-c7597d1487a0/lasuvipix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29355f18-c6fb-4f47-bd8c-8e8fa11c1cf0/wenujexogabowotenus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65db0bc7-e6ef-45a4-928c-3dc62c0e7e16/tales_from_the_loop_rpg_starter_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e65a75-3ab7-4e50-8ab6-3809fa6ae80f/chamberlain_liftmaster_elite_series_logic_3.0_remote_programming.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_off0000e914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE914 5708 bytes
SHA-256: 21c81bec0d9c5ace5f06bb8b73e8b7e4643949ed2ab84d5c7009ca53e2aaaf3d
font_01_sfnt_off0000fc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 11500 bytes
SHA-256: 32b24d48ab0f8c7ce8d7d9e565441eda170c11a50c83aa1e29b6052213b014bc