Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7ff367519f7714…

MALICIOUS

PDF

74.4 KB Created: 2021-03-07 01:13:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: b61c65bccc039396fd3ef4460c27c73e SHA-1: ffe737796e1c0d51e4813856ab975821d9aabe44 SHA-256: 8c7ff367519f77143c4b655a43885c1cbd2bca8293d39ef01a0336acdf346eeb
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a significant number of external links, suggesting it functions as a link farm, likely to redirect users to malicious sites or for SEO manipulation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=don+randi+net+worth PDF link annotation
    • https://cdn.sqhk.co/kululojilo/7zox5tD/hoverboard_back_to_the_future_prop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418579/normal_6039d2c97d253.pdfIn PDF document text
    • http://bahis-sikayet.com/638907515717puek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408583/normal_60035483668c1.pdfIn PDF document text
    • http://dostafood.xyz/contax_t2_camera_bagaszfw.pdfIn PDF document text
    • http://3203epworthcres.com/how_to_remove_dyson_dc33_brush_headpx9ts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427300/normal_6004b7054e11a.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/VA6hdMq/spot_desmosomes_function.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4d7acc7-03c5-48eb-9532-9c75d994f975/tigud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/632c3a33-673a-44cb-a7af-8ea54eee490b/the_standard_401k_withdrawal_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f5c7b8-124d-4f40-b90d-b2e43669c514/62944621188.pdfIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_791ee0a0368b41a5bd664410bf2970f2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5212218e-cf9b-4997-a80a-a3fa041f38eb/6700957970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4a5a4da-ec7f-419f-94f3-a34a5dc9c7ea/bose_companion_3_vs_5_comparison.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7cc617e-e98c-4f99-a6fc-fd295f8110e3/tidotula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c7709c-7089-49e9-8704-a23177c6df9b/dapareto.pdfIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_c9ee4a3123f14b6cb54cdc9d8dc640f5.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_off0000e998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE998 4792 bytes
SHA-256: a9a2840da46cecdf70590706cdb9384fb632c0991dfb23581c25b78aadf3beb7
font_01_sfnt_off0000f9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F2 10292 bytes
SHA-256: 1db4941b1d0750e389e47f6d2420d478e534ebbd3d3fabb3a5a4805e293a893b

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