Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8bc83b201afd7fc…

MALICIOUS

PDF

79.3 KB Created: 2020-12-17 23:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4053623ed220570850f0bbd6a1cfa7eb SHA-1: 10d71371eca9723e628f551d2447def242fe1df9 SHA-256: d8bc83b201afd7fc657da18a2e7c8dd4ee591f6dbf54e4dc231f59ffc2c094cc
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://trafffe.ru/strik?utm_term=physics+notes+pdf+class+11 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475197/normal_5fc317f95ebf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384644/normal_5fc202be3ad3e.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/5fc556b8a3bf4b14abc694f3/t/5fc7c66698e12849e070d9fd/1606927980453/dank_tanks_mod_apk_unlimited_money.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd037129c5e2669026affa/1606222706245/chemical_reaction_crossword_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc528438139af037660cc1f/t/5fccd7f25177ea328cc10841/1607260147272/39973534028.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28fecc30a162e0c5d0be7/t/5fc3a3a8173fb5383b12a62b/1606656937375/the_landlady_roald_dahl_summary.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ef5cbe9b69395124a64b/t/5fc8912a094cf7617dc43691/1606979883382/39710321736.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b1f5bdb33045eee2efc6/t/5fc6722d7acac6192aa072a6/1606840877751/54331698775.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c410bdb33045eee38129/t/5fca282c3ff94c207e122ade/1607084079983/6649576321.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3612fc6229360ecbcc3d9/t/5fc4aeeaeaf37e3b6430b933/1606725355402/31742418223.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/2_part_songs_for_choirs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18963085bf90c0e0195e8/t/5fc9871a196a600d3c283404/1607042843906/wurini.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_off0000fb87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB87 5304 bytes
SHA-256: fc3292660701cde44328d2ca98767c7cd05c1dd57309fc855bdbe77143f206bc
font_01_sfnt_off00010da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA1 10272 bytes
SHA-256: bdfbc072569ef6b50e257c1af89d9147fe937362b7eaeb2a56b6226da758245c

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