Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1256f6ee3a2fac…

MALICIOUS

PDF

78.4 KB Created: 2021-03-27 18:17:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e04e69ef722ae4f54a15cecec647fcfe SHA-1: 11b8b77cdae9b438e96866c0608925a6b16b5330 SHA-256: fb1256f6ee3a2fac09c94f9b7596506d68193e5855fdbfd0fa8e55ecb4cd751b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it's part of a link farm, containing numerous external links, with one pointing to 'xezojetit.ru'. While no scripts were extracted, the PDF structure and link farm nature suggest it's designed to lure users to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/123?utm_term=spiderman+logo+images PDF link annotation
    • https://dawerofe.weebly.com/uploads/1/3/4/3/134361643/wodikejukazotisu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490133/normal_601fe07a0ad53.pdfIn PDF document text
    • https://pavibizad.weebly.com/uploads/1/3/0/7/130740264/zijisulup_goguxaboxe.pdfIn PDF document text
    • https://likixolokezixi.weebly.com/uploads/1/3/0/7/130738950/7d4d91ec1.pdfIn PDF document text
    • https://fuwurukuzubefek.weebly.com/uploads/1/3/0/9/130969433/62064.pdfIn PDF document text
    • https://bejitukinerebi.weebly.com/uploads/1/3/4/8/134890105/nimonom.pdfIn PDF document text
    • https://guxuxexor.weebly.com/uploads/1/3/0/7/130775085/jogujeke.pdfIn PDF document text
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/sixetebidel.pdfIn PDF document text
    • https://wexasubofuxumeb.weebly.com/uploads/1/3/2/7/132740188/nuvelo_jadowed_faveze_totujiduz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380211/normal_605906a7c3efe.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://uploads.strikinglycdn.com/files/c676bf2d-8c06-4199-a753-7e9c0acc309f/how_to_use_vizio_sound_bar_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2709424a-b7e3-4885-b5ec-68bb971c811b/94556366250.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/27215682812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc3fca5c-44f6-42f0-a78c-d3797f6c000a/97214991305.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/91175547242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19143277-661c-4299-a170-7a4648b8cf2f/logitech_harmony_ultimate_one_vs_elite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b592e53-93bc-4b35-b8f9-66b0cb1a1465/88081857062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/103b0e60-c716-47dd-bfff-36c370df5ab0/fifitusowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1415e4d0-d785-438c-ab81-044eef599246/processing_time_for_190_visa_act.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/nibewiwogijosavigipok.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_off0000e8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EC 5088 bytes
SHA-256: aeaad3e4ce5a389fda8c4061d30eef6dafd5960f91b9d07b774d609c68b2b35f
font_01_sfnt_off0000fa04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA04 10768 bytes
SHA-256: cfecd209584993a51e0f178f35966aff63cab2f2fb3b7df5379dc4c3979de1a1
font_02_sfnt_off00011eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361