Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad32fc055b6253f4…

MALICIOUS

PDF

78.5 KB Created: 2021-04-19 01:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d9ea7be349a8a3906691c1b64ff2cc94 SHA-1: 25211622d091f34e5057d7961a73d66a33dd69e6 SHA-256: ad32fc055b6253f46f40b7700a8a44358bb93b6174963efc271d7829fbe3c904
194 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as a link farm and a potential phishing lure, with a high ML classification score and ClamAV detection. It contains numerous external links, many pointing to disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The presence of embedded URLs and the 'Fake invoice / payment lure' heuristic indicate a deceptive intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=best+school+for+supply+chain+management PDF link annotation
    • https://cdn.sqhk.co/dikapagoloza/gZe8hab/xidazusafefitopogabib.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/gghciaU/stack_crush_ball_paypal.pdfIn PDF document text
    • http://onatural.space/msi_h81m-e33_bios_updateonelk.pdfIn PDF document text
    • https://cdn.sqhk.co/tesebere/jhLgdjd/99902399589.pdfIn PDF document text
    • http://dalnoboyi.xyz/39534897364kgh6e.pdfIn PDF document text
    • https://xutafutixon.weebly.com/uploads/1/3/4/5/134576274/kimoxupudawawu_nibasetunituxuk.pdfIn PDF document text
    • https://ponixojezunuto.weebly.com/uploads/1/3/0/9/130969897/gejazupo_xamemak_gavosesuvesoga.pdfIn PDF document text
    • https://cdn.sqhk.co/bejadelu/3zkgghb/xedevitotalekijowibuweb.pdfIn PDF document text
    • https://litiwufedoza.weebly.com/uploads/1/3/0/7/130739575/motiliwu.pdfIn PDF document text
    • http://shtampshop.ru/dwarf_fortress_lazy_newb_pack_mac_download7cws6.pdfIn PDF document text
    • https://diwekivoveludu.weebly.com/uploads/1/3/5/3/135313391/6f6f761.pdfIn PDF document text
    • http://venimetifinodi.iblogger.org/radio_shack_pro_94_owners_manual.pdfIn PDF document text
    • http://copyrightmediahelp.com/lebulerozeil573.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9b56c271-8e60-4ff0-96d1-8930f8c082f8.filesusr.com/ugd/5a1ab0_5ea78da0f6df416fa7732d2f24c11850.pdf?index=trueIn PDF document text
    • http://gobipubefosoja.epizy.com/62960659787.pdfIn PDF document text
    • http://wipapirub.epizy.com/4061737336.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/kamekirimobozepebakefexex.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/denon_avr_1611_remote_control.pdfIn PDF document text
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_bb57a710d4b04d5a8d2c7f6506854f16.pdf?index=trueIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_305bb4e64b664cd49ee03dcfff44ba5b.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_bb9cf1fed0e14f59a38c782fdf578f53.pdf?index=trueIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_9e3b615302ee44868b23604d72affb11.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_off0000f56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56B 5580 bytes
SHA-256: c2bf6d29e583513a9cb6eafbec30744cfed4a418944e9c316df87fa57f9a6a96
font_01_sfnt_off0001084b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084B 10660 bytes
SHA-256: 79f1027115f061052f26dbd7b05053cf29d8b9ceaba5652a45c794efc1fd5d04