Malicious PDF — malware analysis report

Static analysis result for SHA-256 479d48e250fe1f3a…

MALICIOUS

PDF

75.1 KB Created: 2021-03-25 14:13:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 17f462431ec6ebe1fa2ab4544f45ed2d SHA-1: 53f40239fbd904e307eabf85140777e8d56d14e1 SHA-256: 479d48e250fe1f3aaee5f5ae29dfff5e6ad95c79581891a68c28f66d34c97411
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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://ponafet.ru/wix?keyword=tu+me+cambiaste+la+vida+lyrics+in+english PDF link annotation
    • https://jogojirodatu.weebly.com/uploads/1/3/4/3/134321770/zososopo.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/zB95Fid/map_of_uk_countries.pdfIn PDF document text
    • https://doliwejivus.weebly.com/uploads/1/3/4/3/134353379/49d9030.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/j6iagdX/vexetinuvenakakutuwibobez.pdfIn PDF document text
    • https://gapotijaj.weebly.com/uploads/1/3/1/3/131383657/f172e5fc.pdfIn PDF document text
    • https://gekiwudev.weebly.com/uploads/1/3/4/7/134769606/1e110737332.pdfIn PDF document text
    • https://morutasatosode.weebly.com/uploads/1/3/4/3/134366393/kejituxufojufux.pdfIn PDF document text
    • https://sibolapitabake.weebly.com/uploads/1/3/4/4/134469628/kedum_vazin_merasufenugugut.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/boxavera.pdfIn PDF document text
    • https://pufakifitapota.weebly.com/uploads/1/3/4/5/134581323/katutumidezop_mubetuxaseju_rugipasupuvaj.pdfIn PDF document text
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/xesapemidovan_lojadatasekago_kizefilinokini.pdfIn PDF document text
    • https://jikudirag.weebly.com/uploads/1/3/4/0/134040407/3173592.pdfIn PDF document text
    • https://bupedokan.weebly.com/uploads/1/3/1/6/131607930/visefexiwelunamiv.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/icc6Ujh/golden_globes_viewers_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/silakozafi/ZhfZBri/28222023801.pdfIn PDF document text
    • https://cdn.sqhk.co/mepofazobi/DJiMiam/best_time_to_visit_florida_beaches.pdfIn PDF document text
    • https://nojefawagalubab.weebly.com/uploads/1/3/4/2/134266261/a1c01a.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://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_2e299f4ec64f498ea58c04dc2a91397a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3854586a-000e-47cf-a205-4f793cbe5fef/why_is_my_kenmore_refrigerator_leaking_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76c3ab9-a998-40f3-afa9-bc07e600b156/autocad_software_student.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda18c2c-6704-4fb6-b19c-62952d0fa013/lg_inverter_direct_drive_washing_machine_detergent.pdfIn PDF document text
    • https://b18ac5c8-c825-4c59-a0a1-290c879ce4f6.filesusr.com/ugd/1a0fde_ff1285503ea840dd84ed182d50b0067f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b59297-081b-4c3b-b673-69ad035950b2/wopowoxikakibefamenuleril.pdfIn PDF document text
    • https://f9cb7010-568c-45d0-b0a5-7bd630b60272.filesusr.com/ugd/b10ea2_49f09bbfde5040fa9b981f27be02f4d1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1E 5376 bytes
SHA-256: 6a7882e12caa6293640a36d80fbee91d1aa116790b5a1e4e123770b0ece71dc8
font_01_sfnt_off0000ec34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC34 11200 bytes
SHA-256: 14b650e6f1352a11051ea206edcae1363cf52309ace8c9043fb354680f253f55
font_02_sfnt_off000110cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CD 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e