Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc260abe19c21b8…

MALICIOUS

PDF

87.3 KB Created: 2021-03-28 17:37:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 6d6e3b72b32225ffec94600cd763b8ce SHA-1: e8ad731628362a7cbcbc8483aaed108e7b37cd26 SHA-256: 1cc260abe19c21b80a16eee7fd86d0d1de86091b7320f0ff61ec0d5a5dc38c10
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to potentially malicious domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the ML classifier's high confidence score. The ClamAV detection further confirms its malicious nature. The primary attack pattern involves redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/wix?keyword=tour+guide+courses+in+botswana PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411228/normal_5feec19a2be73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476593/normal_5fe68ea0f0f36.pdfIn PDF document text
    • http://trycabinets.xyz/whats_better_12v_or_20v_drillvtjds.pdfIn PDF document text
    • http://healthyforczechrepublic.site/56035210182n42x.pdfIn PDF document text
    • http://dreabling.online/mastering_the_art_of_french_cooking_volume_2_contents3dg0x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420448/normal_5fe8347b1e18c.pdfIn PDF document text
    • http://tertov.xyz/how_much_does_it_cost_to_get_a_transmission_solenoid_replaced27qeq.pdfIn PDF document text
    • http://musc-media.xyz/47402179243l77qn.pdfIn PDF document text
    • http://coolvdomaion.online/jaxor7tvri.pdfIn PDF document text
    • http://form-copyrightservices.com/400790517060m8j3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467298/normal_600fc4446889b.pdfIn PDF document text
    • http://raifaisentgo.online/lalazemunozvibr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387406/normal_5fd3beec89b8f.pdfIn PDF document text
    • http://lidlid.xyz/biology_project_karyotyping_activity_answers2ca4q.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
    • https://704d67de-a0ba-412a-a77d-f8c4cf0d88a3.filesusr.com/ugd/a83d94_7095ebd362254a4cb993d7e73c8deaa6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4e3099-969d-46ac-83cb-01a3fb36b9de/panasonic_lumix_fz2000_fz2500_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a226dddc-e03e-441c-a564-4bce6b9e569f/the_secret_life_of_the_american_teenager_episode_17.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_39b2d41fbb734457aa1ecccfc049e6cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/610b9044-1e3c-4ec7-b79b-d52d667a6af0/miniature_dachshunds_for_sale_tampa_fl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a760eb-69b1-47f5-8435-9a41d4931b95/83331809083.pdfIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_77c00c29653c4dd7854b65ec4e53c59b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3081ed9-43fd-418f-9d05-fb80a1c7c2a8/94784805441.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_off0001093f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093F 5136 bytes
SHA-256: 302ab925f1a244fb76cbe026a0203250dd3d0718ed628e33602294c126b6fc89
font_01_sfnt_off00011ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD6 11332 bytes
SHA-256: e8fd26d83f07639b75eed5cf9177865c955d7ec220a42a7766f5f0890e69c195
font_02_sfnt_off00014162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14162 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c