Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee35862a218005e…

MALICIOUS

PDF

81.9 KB Created: 2021-01-10 16:03:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3f4b2b8ee525aa86e4694247ae6fe1e3 SHA-1: eee53867a56fdd3094b42e269f8efbe72a5f2f87 SHA-256: 4ee35862a218005eec730c69e3c9974595f4a7df959e07ee0b3d3985a11e45c8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest it's designed to redirect users to malicious content, likely for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=roblox+got+talent+piano+sheet+happier In PDF document text
    • https://static.s123-cdn-static.com/uploads/4491673/normal_5ff6c274db306.pdfIn PDF document text
    • https://cdn.sqhk.co/dusimefosix/YcBgg9o/pujotesepabekefej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_5fac1fd65618c.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/3jdjilX/my_arcade_pac_man_pocket_player_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486969/normal_5fb9fbe69a2ab.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/e22henY/stack_it_peg_game.pdfIn PDF document text
    • https://cdn.sqhk.co/towitudamuga/jhgg464/nova_video_player_vs_archos.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/nuxulikiwab/47722506408.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/63983460606.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/guided_morning_meditation_for_anxiety.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/18550579442.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/grade_10_math_answer_key_unit_1.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000114f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x114F6 22068 bytes
SHA-256: 68fd97ff2f32b7ec9fa3be08fec5c756e47f7366b93400b6face9f5f1491adba
font_00_sfnt_off0000db97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB97 5296 bytes
SHA-256: b65855bb02c802e430c5577fe8c306e25b4ccb2289d51407cdeac146f0d00f8c
font_01_sfnt_off0000ed9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9D 11444 bytes
SHA-256: f7993ec15a49b9a67a2527d1266cdbae4d8b8d391182511122fed1cdc2c67546

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