Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bede88169841d48…

MALICIOUS

PDF

70.6 KB Created: 2021-04-07 16:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f3f2f368b4e0eadae7791371eacff6a0 SHA-1: 52db8f800b3adfcdc4e7a22ddc3eb9cce92cb3c0 SHA-256: 6bede88169841d48f3d3047211fc5bd3e931e58b7b519c2e70ab3c5851c3e38c
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 0.9991

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://botokaw.ru/wix?keyword=worksheet+oxidation+numbers PDF link annotation
    • http://com-copyrighit.com/ximoxalegakuxudegovirl2nol.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/xuvej-fozefew.pdfIn PDF document text
    • https://damanula.weebly.com/uploads/1/3/1/8/131856109/zudawu.pdfIn PDF document text
    • https://rinixupikexem.weebly.com/uploads/1/3/4/0/134096042/365818e5e.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/3dl7N2F/adventure_super_jungle_world_level_53.pdfIn PDF document text
    • https://kuvezuwuziteb.weebly.com/uploads/1/3/4/3/134388010/3841102.pdfIn PDF document text
    • http://intereriia.com/754380870312e23x.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/hgjadOa/fonts_keyboard_text_fonts_emoji.pdfIn PDF document text
    • http://bumaga.bz/avadhuta_gitarie7h.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/mozexinolipibe_posifu_nadoxezasaluka.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/ebjfhfQ/35487154250.pdfIn PDF document text
    • https://cdn.sqhk.co/kibizatududo/bOhiaib/53043528389.pdfIn PDF document text
    • http://formulamoney.top/15354755914w3cpd.pdfIn PDF document text
    • https://wanalupegekiful.weebly.com/uploads/1/3/4/8/134879682/bfc3b931.pdfIn PDF document text
    • http://jusapp.club/toxic_wap_movies_20186uq8w.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/hcPmgj0/exonerated_definition_in_a_sentence.pdfIn PDF document text
    • https://tuminiride.weebly.com/uploads/1/3/1/6/131637714/nunevakar-zozusuzuvati.pdfIn PDF document text
    • https://lebiranewedeto.weebly.com/uploads/1/3/4/5/134595514/nifebewuxinit.pdfIn PDF document text
    • https://banafovogakake.weebly.com/uploads/1/3/5/3/135326552/xumopetupajel_tiverezu_mowisejugagi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d9c40a-4fe0-415e-a845-00e7aee08fd3/69281358529.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/adobe_illustrator_templates_free_s.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/joxatagitoxup.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/5462868289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31ecb10-07df-4553-b439-eae6cad29692/how_many_calories_does_an_hour_of_jumping_jacks_burn.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/rowokosasinifoniki.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_off0000d468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD468 5316 bytes
SHA-256: 24eda927d55b2722c3fcf954c74edff5befbf4620fcbf7ab1297dce8c1b22040
font_01_sfnt_off0000e65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65C 11364 bytes
SHA-256: 3fec8fd368b21abc6007094177bb50c67a3ea127a852b3b7597418ea84364335