Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6a1260777e7053…

MALICIOUS

PDF

78.2 KB Created: 2021-06-02 04:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aef008863c8bc991ec9884b5182acec3 SHA-1: a64e12a1669864c4c892de2ab6aaeb675ef0bfb7 SHA-256: 7f6a1260777e7053460056a8afe5d85e4182129027965ec743bd60bce82b31b2
186 Risk Score

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 0.9996

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://fokemale.ru/123?utm_term=metaphysical+anatomy+volume+1+pdf PDF link annotation
    • https://rufawakifored.weebly.com/uploads/1/3/1/8/131856207/luzulunudi.pdfIn PDF document text
    • https://navubenawegef.weebly.com/uploads/1/3/4/3/134320789/7398022.pdfIn PDF document text
    • https://mafadojidakiwo.weebly.com/uploads/1/3/1/8/131871721/zubogugigesinufebapu.pdfIn PDF document text
    • https://dorubirema.weebly.com/uploads/1/3/4/3/134317311/risekabaseg-momirenozizud-nusibigozomegot-juvurix.pdfIn PDF document text
    • https://wiguvufa.weebly.com/uploads/1/3/0/7/130775639/9155214.pdfIn PDF document text
    • https://radotarurejatu.weebly.com/uploads/1/3/1/6/131607565/tuxetoxekakubidat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tarogifere.pbworks.com/f/97727307136.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/f/invitation_to_the_lifespan_3rd_edition_chapter_2.pdfIn PDF document text
    • http://memofemovo.pbworks.com/f/10081389249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0f4ab0-5f8d-4c8f-915b-d06646c6a5d6/ravenloft_5e_module.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a521ebd8-a557-42df-8b28-ae6b7bf44b8a/contract_employment_act_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57910c9c-57da-4ab7-91c4-3f2f19820eb2/integration_of_secxtanx2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/095ae992-4208-4018-9d51-43f3cd930324/94119992178.pdfIn PDF document text
    • http://larabefejaji.pbworks.com/w/file/fetch/144484122/is_ben_10_alien_force_on_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6d042a-8479-4110-9397-d0cdb6f09c16/what_is_memento_mori_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9df8cf-b87f-4b63-b194-7316e0b5b531/how_do_you_do_an_observation_on_a_child.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed6e3a58-2fc1-48f6-b815-b431a8dc5018/99994722492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965d5d4f-02f1-4f39-9627-73be251d3381/zexuvopafinapimubiw.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144484089/43137809661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6dd42db-b8d7-4a36-a22c-1de3ece17cdc/76126080451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca249219-d147-45a3-8a3d-6e72cd2a4201/char_broil_performance_5_burner_gas_grill_replacement_parts.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/w/file/fetch/144449244/93224415736.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_off0000f071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF071 5520 bytes
SHA-256: f1c83cb5bd46d824c53904454a91b9e9bc3b5a76b6687e4cb4924af056eb84dc
font_01_sfnt_off00010331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10331 12080 bytes
SHA-256: 818bf06691110f6340dfa146b4161208f70f7dff9a0b359e7681bd95bbefebfe