Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bdfbde32f7252e…

MALICIOUS

PDF

77.4 KB Created: 2021-03-11 21:51:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b0cfc95a6c41e7f9c9f38496264e78be SHA-1: 5084efaa4c61d4d9de1dce6ce03ca73967e5960b SHA-256: 02bdfbde32f7252ea449906f7b553d81f93f1f76a7394fba759773b85b261884
186 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 0.9992

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://xezojetit.ru/123?utm_term=above+all+lyrics+video+free PDF link annotation
    • https://cdn.sqhk.co/torazanopuni/On0ifgf/42707740535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492294/normal_5fd79bd0764b3.pdfIn PDF document text
    • https://cdn.sqhk.co/navififoro/hieHuhi/fear_the_walking_dead_season_10_netflix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453907/normal_602882bb47d5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_60392ba16d32f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466659/normal_601b328ed15e9.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/rgc2gcC/dofar.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/jhijcg1/ruwov.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/wositonosivakipevov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418556/normal_5fdf2f61e3a41.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/B3RHjdz/paint_sprayer_rental_ace_hardware.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483082/normal_5fe9022b27bbe.pdfIn PDF document text
    • http://semowatuk.iblogger.org/63273073648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417329/normal_600b5154757fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386084/normal_5fc620e02525d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://golagesobowe.epizy.com/sagukugexamik.pdfIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_38145452ebe547c88cf8af7b49afefb8.pdf?index=trueIn PDF document text
    • http://damewanobojojo.rf.gd/kugumimupof.pdfIn PDF document text
    • http://guwaxilajoxeza.onlinewebshop.net/25471083882.pdfIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_0c900d3d61654996aad052795b3f4cce.pdf?index=trueIn PDF document text
    • http://deroselewem.epizy.com/poginepivusanaf.pdfIn PDF document text
    • http://xuxusemo.epizy.com/advanced_systemcare_pro_free_for_pc.pdfIn PDF document text
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_20a2c2a32ace4202ba54db90f17e0c6c.pdf?index=trueIn 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_off0000f26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 5308 bytes
SHA-256: efe1124e13fcd43e475f6aad1bdc5800755dc710af9e97dbc3928dad3e3c093a
font_01_sfnt_off00010495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10495 10356 bytes
SHA-256: 5d1a60e6b60be93c93310eb1db0c45b8de18dd649afa5d75490cf125545ae66a

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