Malicious PDF — malware analysis report

Static analysis result for SHA-256 057229b6aaf99e38…

MALICIOUS

PDF

86.6 KB Created: 2021-04-07 08:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b06baa65d3c9130c87b134939aff9d6d SHA-1: 109f935c9a53e08862ef8303187e4b130e1d2475 SHA-256: 057229b6aaf99e381995e49f8a69ae54213988068bbf188082da72ce22dba395
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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=can+you+pressure+cook+a+whole+chicken PDF link annotation
    • https://cdn.sqhk.co/nokulebepoba/q3Ykrib/expanse_season_5_trailer_4k.pdfIn PDF document text
    • https://cdn.sqhk.co/zewesifadeka/TCgjggo/police_car_drives_into_protesters_new_york.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzaxube/jgWific/kofufazuvidazokukobumum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481162/normal_5fe967f5c9cce.pdfIn PDF document text
    • https://kafaxidaduxeb.weebly.com/uploads/1/3/1/4/131438036/2793033.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470982/normal_5fcc5bedd8415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394060/normal_602bfcfbb09c0.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/gosaxozijam.pdfIn PDF document text
    • https://cdn.sqhk.co/vijukifezu/fhiKxZb/wazajokepapedora.pdfIn PDF document text
    • http://onlinetiser.website/25476040812mqbz5.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/4MXjbxO/t_mobile_iphone_12_deals_new_customer.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvuvidova/cavzjhP/21779447645.pdfIn PDF document text
    • http://getyourscore.info/best_guided_tours_of_england_and_scotlanddkbvi.pdfIn PDF document text
    • https://vixananuxa.weebly.com/uploads/1/3/4/8/134881407/liwiviludog_funopekofip.pdfIn PDF document text
    • https://gupovokezatiku.weebly.com/uploads/1/3/4/8/134878629/kesoka.pdfIn PDF document text
    • https://puvexamufo.weebly.com/uploads/1/3/5/9/135971660/lemuz.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/hcxoyhq/kazanokejemikup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_f4286aa7a4ec430e9714dd28ece8ab54.pdf?index=trueIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_9736260161644f4dbbe9668dd2f9aaf2.pdf?index=trueIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_ca7f3603a4ae4d649f6e04a8366569f1.pdf?index=trueIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_b44ff1dfadfe479796fad6aa17deeded.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEB 4404 bytes
SHA-256: 8f8d04ca0cba85409856e5835bad3fecec8a8d7ec1e8ed4e56c208c24465a140
font_01_sfnt_off0000fc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 5184 bytes
SHA-256: 9e946c8730bfda7bb9e9bb2db265554bddffa6805ec8e5d7f0581aa863cbf933
font_02_sfnt_off00010e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E22 11500 bytes
SHA-256: a571dc8e2fd433409ba3d20889a45fe1c0958cdb83971af92294b562ed4710b0
font_03_sfnt_off000135ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135AC 16156 bytes
SHA-256: 895014e684797e364439b52153cfd938b4fb75883263d884c8f7bbf9b610fbc9