Malicious PDF — malware analysis report

Static analysis result for SHA-256 86622b95334d87d9…

MALICIOUS

PDF

72.1 KB Created: 2021-01-14 11:54:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a03bb130f49bc8e37277a97e88e00939 SHA-1: 7570eea4a8e55fa8af1e055188aeb2cd4ab4b466 SHA-256: 86622b95334d87d97d5e1b4cd82a0d2a31f9c0448213d685a6d3c5b78a03d2d0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=i+hated+tonto+still+do'. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The document body is heavily obfuscated but the presence of a malicious URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=i+hated+tonto+still+do In PDF document text
    • https://site-1175725.mozfiles.com/files/1175725/milabuwazorevepuxiwuno.pdfIn PDF document text
    • https://site-1168274.mozfiles.com/files/1168274/roman_numerals_date_converter_australia.pdfIn PDF document text
    • https://site-1176236.mozfiles.com/files/1176236/posodufepifumis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bojafazes/amleto_di_shakespeare.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/55574314703.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/time_am_pm_ki_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/suxazafavik.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/video_ideas_for_projects.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/18462544692.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/69055295384.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/15736130913.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/pico_sim_date_2_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/pure_fix_bike_review.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_off0000de1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1E 4752 bytes
SHA-256: 57c57c43441821cde1143038bf777175ebb88c1df407fdc43b25a3271b93ee29
font_01_sfnt_off0000ee3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3D 10588 bytes
SHA-256: aeeb30952c709dd80d8807b171c783d7f45deb01f54d221a0e0c72409b58636d

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