Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1cd3692f27c3e3…

MALICIOUS

PDF

84.9 KB Created: 2021-04-04 07:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fed952fc33f103fd10ac7024f0682fc1 SHA-1: 992ad4deb6fc65ea3ab49b19cd5b604055465e4a SHA-256: fa1cd3692f27c3e3d91c5c0cdc55d6f25f11ebecb84f9d065bb8b65287bacd64
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by multiple heuristics and an ML classifier, indicating a phishing or malware distribution attempt. It contains a large farm of external links, with one prominent URL pointing to 'bologen.ru'. While no scripts were extracted, the PDF structure and extensive link farm suggest an attempt to lure users to external sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=how+to+install+rslogix+emulate+5000 PDF link annotation
    • https://gideturifit.weebly.com/uploads/1/3/4/8/134887905/denukemexokep.pdfIn PDF document text
    • https://soliduratop.weebly.com/uploads/1/3/2/3/132303261/4742134.pdfIn PDF document text
    • https://lisopivoxo.weebly.com/uploads/1/3/4/9/134901835/beruxogogesute.pdfIn PDF document text
    • https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/0b00f6a11a75cb.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/sitalolifavo.pdfIn PDF document text
    • https://maxuvejalova.weebly.com/uploads/1/3/4/2/134265339/7edad57f8d09b.pdfIn PDF document text
    • https://wusitezuredov.weebly.com/uploads/1/3/5/3/135314125/ca51f2888.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/vodalapameditoso.pdfIn PDF document text
    • https://kowedeta.weebly.com/uploads/1/3/0/7/130775164/a42dd12a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_39edd4773b064cdd8c3be9698b7bc0c6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/195ffe39-7b63-4c1a-88f1-1b9148f2a882/kujunevofukapax.pdfIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_293531a5f7ca41eebeb591bafd1df6ad.pdf?index=trueIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_6f213996fa9847d9983425b0a051b7aa.pdf?index=trueIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_5a6edac0c5634d06b2de617f34d0fb57.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62bbbbfb-fd8e-4e2e-b2ad-60fb9c2110b8/2020_fellowship_match_results.pdfIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_0c3a8820491641828686963660152686.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f2989a0-caf9-4676-8075-2f1014482bea/zubizorerufefixobisijen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dcef757-8082-43d2-aa1c-dae497498568/52850441279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/944e1a3d-937b-42dc-9808-1e4ec89c3abb/viking_bbq_parts_near_me.pdfIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_ffeb5dad31064ac0a9c7ce3739c58b3d.pdf?index=trueIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_bb5139b3aa434404a522086dca8b7d87.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf195b04-ff5d-4012-af65-06d905553b9e/jalavijogerijurat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb208b6-d1cf-44a5-91d2-551909097260/life_application_study_bible_new_living_translation_tyndale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25655809-19e8-4d7a-8fae-8b7d839131cd/queen_of_shadows_hulu_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e29ec75-7278-4b9e-b7ba-aae9520d4faa/kitchenaid_refrigerator_not_cooling_but_freezer_is_fine.pdfIn PDF document text
    • https://0115c081-d8bc-4983-a705-81db93bf1442.filesusr.com/ugd/990402_47a257237c444002847705386d3d87f1.pdf?index=trueIn PDF document text
    • https://6323cc82-cf72-43ae-bc7a-f8d691a1d37e.filesusr.com/ugd/4f3578_5e331245427949059f4e5c630c17f8ba.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_off00010c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C25 5392 bytes
SHA-256: 4c26cd60ac8502434810006da0df495e0bcbd096fef82c3feb76905731ad1cdd
font_01_sfnt_off00011e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7B 11532 bytes
SHA-256: 8ea8ea249e8cb54993add1b46eae3b937c696a5b62e585d530eb8cea707e7ba3

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