Malicious PDF — malware analysis report

Static analysis result for SHA-256 026f291baca49438…

MALICIOUS

PDF

82.7 KB Created: 2021-06-07 10:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0d09e6e7658540851cbc33fd51bf929f SHA-1: b0ec994ecbec7e85ab7f7f439cf446c9011c3fc3 SHA-256: 026f291baca494389807fd4d7eb4e0ef036994596de9b57418bd67b2a971719b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9954

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 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://garglob.ru/pbw?utm_term=fake+college+id+card+maker+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486053/normal_5fe6f3ad85495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418987/normal_601abd620c50d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493549/normal_605afd93d3d6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369908/normal_5fecef0c62f43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408462/normal_60bd942544eb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_60b99cf733dd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_6045e0307761d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501383/normal_601a7726b3117.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144416433/famous_quotes_on_friendship_in_marathi.pdfIn PDF document text
    • http://pitevaj.pbworks.com/w/file/fetch/144583617/89402711637.pdfIn PDF document text
    • http://kefimazusob.pbworks.com/w/file/fetch/144424929/suwevapob.pdfIn PDF document text
    • http://marutipug.pbworks.com/w/file/fetch/144429090/1383904185.pdfIn PDF document text
    • http://junerew.pbworks.com/f/16836648422.pdfIn PDF document text
    • http://guronavageba.pbworks.com/w/file/fetch/144488031/divina_commedia_traduzione_italiano_moderno.pdfIn PDF document text
    • http://wigonewakil.pbworks.com/w/file/fetch/144668544/43827085933.pdfIn PDF document text
    • http://zekodunu.pbworks.com/f/aws_certified_solutions_architect_associate_the_ultimate_guide_for_the_saa-c02_exam.pdfIn PDF document text
    • http://fevawigo.pbworks.com/f/admiral_dryer_aed4675yq1_manual.pdfIn PDF document text
    • http://xugilip.pbworks.com/f/important_facts_about_human_body.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/23465922568.pdfIn PDF document text
    • http://vibasuvezuz.pbworks.com/w/file/fetch/144503739/76159865414.pdfIn PDF document text
    • http://verodudowop.pbworks.com/w/file/fetch/144775320/35136022997.pdfIn PDF document text
    • http://xetuduju.pbworks.com/w/file/fetch/144685920/ladies_gold_strappy_sandals_uk.pdfIn PDF document text
    • http://xifilipisi.pbworks.com/w/file/fetch/144411492/29035849763.pdfIn PDF document text
    • http://garigor.pbworks.com/w/file/fetch/144660600/kifewepekazaku.pdfIn PDF document text
    • http://vadibun.pbworks.com/f/best_windows_emulator_for_android_tablet.pdfIn PDF document text
    • http://ropotupi.pbworks.com/w/file/fetch/144685746/jalamem.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_off0000f994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF994 4836 bytes
SHA-256: 0a54f3fe6b0f85f8e73aeb2b36cf484072d1bb2e6d9e9338910ded41635a808f
font_01_sfnt_off000109fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FB 10688 bytes
SHA-256: 77b9f61d9e76b630ace5269c997215ecfded2fe7fd5905e06b7fb4abd0c2fed5
font_02_sfnt_off00012e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E94 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c