Malicious PDF — malware analysis report

Static analysis result for SHA-256 988b8144e869ebcd…

MALICIOUS

PDF

70.0 KB Created: 2020-12-18 06:23:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8fa7734385c57a4cda0fa449993d68bb SHA-1: 7b1187c76023dec749b277fe2d3dfffa1f3a73b1 SHA-256: 988b8144e869ebcdbbe606e346683b148b852edbff3965c7521d9092a075e2c2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://traffnew.ru/123?utm_term=counting+chart+numbers+1+to+500+in+words PDF link annotation
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/6746eb955d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_5f9a73b96778a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbfd3c824b06a7eb3f8da22/t/5fc3098f61e25426e19c113f/1606617488748/supercheats_nba_2k16.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/46247408534.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57b0a116eb00e3c6ae87f/t/5fccb73c33187724c4ee3c2c/1607251773128/99179210086.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c374d2523e4b70bd6033/t/5fd6b0d3b1c3f31c7a8df3c6/1607905492453/inverse_bilinear_transformation_matlab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc717bec39fde0238a7ff67/t/5fd0c2c751357b44bb98bbbb/1607516874357/22043867353.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/nsw_food_authority_pregnancy_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc681d15e8e827d42b49382/t/5fd600c15488895576a12482/1607860418746/commercial_aviation_safety_4th_edition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6728f88c99b6d37cd6d35/t/5fd0519f5c296e7a6871ad26/1607487905068/scent_of_a_woman_streaming_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77a6e791da6493f6a9a22/t/5fcdbe6d05ddc9599d419dd6/1607319150089/lobofumobad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5720fc6229360eccb86af/t/5fd6e73b9264095525e784bf/1607919420218/baazigar_film_all_song.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a7ea16f6d44b07c4161b/t/5fcfada90496d067bdde2d2c/1607445929922/space_jam_2_jersey_nike.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ef5cbe9b69395124a64b/t/5fce9cea3bd41d6d5544a011/1607376106494/maze_procedure_medical_term.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd3a0bbb70c1087e468c11/1606236684013/47357070390.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37900ec917750a3e8073f/t/5fc6b51fefc65c5b7a28a60e/1606858017478/sky_fighters_3d_game_download.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_off0000d14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14B 5776 bytes
SHA-256: 5d73c1c3825bcf5079afa6d0989ec98d246812225da4b54409361e493b12b4c9
font_01_sfnt_off0000e4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DF 11772 bytes
SHA-256: 8eff6077b3a8ef8b18ecf4285b26ab47631d42d5f369ea22176c71f62614d35f

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