Malicious PDF — malware analysis report

Static analysis result for SHA-256 159c02c5034d5be3…

MALICIOUS

PDF

69.2 KB Created: 2021-01-18 00:20:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: fe2c1483ed6e4d4cf9af43e363b72087 SHA-1: 1a2161b70d92ba14ff6161ddf026424eed6533c1 SHA-256: 159c02c5034d5be3ba94e3dd3f2f2349bb1997d5b3f30d3ff6f90ef3d1ccd12e
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://traffine.ru/123?utm_term=2016+and+2017+miami+dade+school+calendar'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=2016+and+2017+miami+dade+school+calendar In PDF document text
    • http://zuvakaxosamota.22web.org/71467075269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463286/normal_5fd7c39e39c8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369518/normal_5fccd87e30159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5f910c01a8f0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453102/normal_5fefb56fe8f0f.pdfIn PDF document text
    • https://site-1175190.mozfiles.com/files/1175190/40228291751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484804/normal_5fa94f165b616.pdfIn PDF document text
    • https://site-1174627.mozfiles.com/files/1174627/sigoninafise.pdfIn PDF document text
    • https://site-1173658.mozfiles.com/files/1173658/mountaineering_gear_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452839/normal_5fab51656ee8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486521/normal_5ff94afdbffac.pdfIn PDF document text
    • https://site-1214349.mozfiles.com/files/1214349/11502702149.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/winumigutam/silimi.pdfIn PDF document text
    • http://kiwutixukunow.epizy.com/appointing_legal_guardian_for_child_form_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/the_fields_of_athenry_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/piano_sheet_music_cheers_theme_song.pdfIn PDF document text
    • http://zerakunutage.epizy.com/game_boboiboy_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/evgeny_grinko_valse_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/adobe_premiere_tutorial_free.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_off0000d293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD293 5644 bytes
SHA-256: 756d591760abd719ea7bfd74bdabdf8309e49281fc73c6c0b572dc37705ea552
font_01_sfnt_off0000e5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A8 9900 bytes
SHA-256: 476f6c3115ff9747d5b522ad66192a79de657cd765b4378f026e3bd3949ad6da

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