Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa41e69bdcd7bff…

MALICIOUS

PDF

76.3 KB Created: 2021-03-15 02:00:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c97431e94bb8d0842538ee11e5cf4b05 SHA-1: 1d130d83dad62d6b8171227785822d3abd5b53f7 SHA-256: 0fa41e69bdcd7bfff596f9deb2cc310db963bcfed4458886909c7085f0c78bd1
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The primary URL, 'https://maypoin.ru/strik?utm_term=price+of+gtx+970', appears to be part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=price+of+gtx+970 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413986/normal_5fef4a1a111d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377115/normal_601876f7b9885.pdfIn PDF document text
    • https://katibaluzopoxu.weebly.com/uploads/1/3/0/7/130738884/fb6b2fcf.pdfIn PDF document text
    • https://venivuwaw.weebly.com/uploads/1/3/5/3/135308653/bipazurenirazusemij.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/malubak_xejew_kabapamul.pdfIn PDF document text
    • https://borikalubir.weebly.com/uploads/1/3/2/6/132681749/zedidonorubipetonij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_60069a0244d79.pdfIn PDF document text
    • https://xurobogi.weebly.com/uploads/1/3/1/1/131163732/e8214979ab8eb6.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/vojunofe_naloziwuki_kajejopolot.pdfIn PDF document text
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/vazisipajulek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_6026d2d9d4231.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8717ace1-8174-44a1-9f98-e7cbf9e9ed94.filesusr.com/ugd/14e3be_33b44fc3383b4103aa479a0c726189c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7083020-c841-402a-8d9a-3046cae2184b/zizuligis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ab0edc-58df-4dc1-959d-1dac00b0ee3b/dillon_xl_650_aftermarket.pdfIn PDF document text
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_bcfeb0c9d9a7487e9f0d7c59559a7e69.pdf?index=trueIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_a668db7eb111401a9a550e8d199baa2a.pdf?index=trueIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_b9d389bc19b5421aa157a8de838de356.pdf?index=trueIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_f488b1daa9514936afe7e7a0b857c7c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/93cdad8d-92cf-4d45-a82f-3c0e574703f1/nivemetugugekejadofat.pdfIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_9f0e95b6786d4376bc6420cfce60fbdf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ace4173-2930-4177-b9a1-6066592539a7/wd_my_cloud_home_8tb_1-bay_personal_cloud_nas_server.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_off0000ea5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5B 5076 bytes
SHA-256: 097f51c1c453845bcdc48c9e4d6dd1a6024ad8b154567c80d07cca5393f12eba
font_01_sfnt_off0000fbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC4 11420 bytes
SHA-256: fe9c11e02c7414fa426a1ca0d90ef37d44ec16813f6fd2f547a7f4cd424c8e0a