Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56aa04fdb3d572b…

MALICIOUS

PDF

81.3 KB Created: 2021-05-11 03:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4e00bc5079c1a5a919205cda02ff329d SHA-1: de7c44abdb9ef7e1e812bc6276e7a676becc7dec SHA-256: d56aa04fdb3d572b9991682c0ec6df9d61a2d466a99e8207089b415761fb8e56
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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 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://crophysi.ru/strik?utm_term=yaesu+ft+450d+problems PDF link annotation
    • http://my-favshope.online/what_ink_cartridge_for_hp_officejet_46521awcy.pdfIn PDF document text
    • http://pokafujadiso.iblogger.org/esophageal_varices_classification.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/fCigijh/how_to_export_whatsapp_contacts_to_excel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417527/normal_6040f3db02819.pdfIn PDF document text
    • http://scandisvet.ru/remasewg71n.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/ggiggww/74013823.pdfIn PDF document text
    • http://foguwefo.iblogger.org/dixazukanujosuwilepad.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/giRgfjh/27490010123.pdfIn PDF document text
    • https://cdn.sqhk.co/sadudolamom/fgciiD1/wolf_howling_at_night_sound_effect.pdfIn PDF document text
    • http://hackins.site/bloons_tower_defence_331ctx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486550/normal_5fe5fc8c8a796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481418/normal_603ffc74f16e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464863/normal_5fd8fd1635276.pdfIn PDF document text
    • http://zoomita.space/better_call_saul_episode_guide_season_1jkg5o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fasilew.epizy.com/20055569381.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/zakitexe.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/pokemon_switch_eevee_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51254a6f-af5d-4b29-9147-e94e24f2830b/acer_nitro_7_gaming_laptop_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1295e796-bb96-4e4a-aacb-0a922156ec40/descargar_concordancia_biblica_strong_gratis_espaol_para_e-sword.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/fha_appraisal_guidelines_comparable_sales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6980d10-3dc9-4624-a4d8-9b367b0c183e/gekapowux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9abb9b1d-28f1-47fd-b5c0-f56093cef498/gonelasage.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/letter_of_job_appointment_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/binajawubirej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c3f1256-97eb-4c4b-beb1-24f7933b10a0/bewedonoxuwe.pdfIn PDF document text
    • http://tamufigavoxi.rf.gd/libralisme_conomique.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_off0000ff4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4E 5644 bytes
SHA-256: e49de81ccf55457655b7814d2bfbd1d5fab159c5a4158f400a036a9f9ba903fb
font_01_sfnt_off00011267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11267 10808 bytes
SHA-256: b74360d2251930df8017602aa6eb4cd72f61afde1b34d82aa6ff35ddedebb463

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