Malicious PDF — malware analysis report

Static analysis result for SHA-256 e574014dfba28406…

MALICIOUS

PDF

77.3 KB Created: 2021-05-12 08:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 230d7b02b95186e718c47990be808053 SHA-1: 29107f6f755cc6f1c8359fed82da8992cf9a8cee SHA-256: e574014dfba28406646ce21aa60d977602beb030e4e485ed8e1c7421f8db76f2
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many pointing to disposable hosting, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as Pdf.Phishing.Trojan. The embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content or phishing sites, rather than executing a direct payload from the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/strik?utm_term=what+is+socially+maladjusted PDF link annotation
    • https://widewosum.weebly.com/uploads/1/3/0/7/130775244/sinurokuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_6026df7c451fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405440/normal_5fdf43fa11bfa.pdfIn PDF document text
    • http://goodsfor.life/xojiduderaxaug3wg.pdfIn PDF document text
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/831204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470226/normal_60072150c118e.pdfIn PDF document text
    • https://jawuwokobot.weebly.com/uploads/1/3/1/3/131381435/refop-wagorifagalamen-pilodunogu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387031/normal_5fdd0f99721a6.pdfIn PDF document text
    • http://werenntaq.online/learning_management_system_documentation8wchv.pdfIn PDF document text
    • http://ipoteka.net/kuzurixisaxukanijubmvy50.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/b43d71bf-33eb-48e9-8d29-49d55b7c44d2/rudifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/725a8979-1785-490f-a85c-4c93456c1d03/how_do_you_clean_a_kerosene_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3a13c97-0a77-40cf-a7df-cf0f6e02dd59/95247232542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56a7b08-aed6-4bde-814b-ccd908e14290/ms_drivers_permit_practice_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c02d5a8-05c9-47d0-9010-50d2b91464c2/ladofonatitofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d5e772-574f-4c17-a86d-1d9f36b8e719/xirot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/784e2b6a-3778-4461-863e-4c5f1c391238/juvubimebanemubezokulivew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8437e4aa-8ae2-40a1-af0b-ea95e4d85e1b/how_great_thou_art_hymn_lyrics_catholic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b49d9d3-ce6b-4cfa-b700-646d328efc48/how_to_use_avent_manual_breast_pump_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d86dff-ce0a-48ee-a062-ba26a50f6217/nunexevol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e58f5e60-769e-4b25-a9df-8bdb951bb2b2/78028661896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e121e8-2d1a-44ec-b889-628a2c36f7b7/alex_rider_review_guardian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/701d869a-c647-4a6b-b7fe-395a00853528/dd_5th_edition_best_class.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_off0000f190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF190 5272 bytes
SHA-256: 8728678536b0050ea3accea2c1a24958fb7940d6b258dc372d081e6ca704d20b
font_01_sfnt_off00010373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10373 10688 bytes
SHA-256: 59e37dcf1178a2538f4fefc119fa2282ab9312e9b1562097c30b1a57ac4490a1

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