Malicious PDF — malware analysis report

Static analysis result for SHA-256 346edb38a70706ac…

MALICIOUS

PDF

78.9 KB Created: 2021-01-02 12:18:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 24af1fa9a988175387a9db1489e59a9c SHA-1: 72af8a1f1f92a1e3f1924a1eaeab9f721b8eac6c SHA-256: 346edb38a70706ac62aeb4d14c9221ba1e51c11f6b19ca67f262fb7a406055d4
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a link that redirects to known malicious infrastructure, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'Railway ticket reservation form', likely intended to trick users into clicking the malicious link. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/aws?utm_term=railway+ticket+reservation+form In PDF document text
    • https://cdn.sqhk.co/pavujakorige/7LihFI7/65036306710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496015/normal_5fb5d00e9dc4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373240/normal_5fc4f4006e282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_5fa2809559b6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388285/normal_5fd7df89979ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f86f5d4611f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5f95300852c8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mokuwanibof/rogues_general_store_stash_unit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea7049f-7c56-473e-801e-1f81a049211a/kimesegokadutuligigaput.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/gre_physics_preparation_books.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/muwatoboxu.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/99808566070.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23F 5140 bytes
SHA-256: dc40205ba8413f4a1e465a12206e638b3d41d48e752b7c9d705bc768401c64af
font_01_sfnt_off0000e3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B7 11284 bytes
SHA-256: d066335e47b517ece07f435bd2e0a3b8a9cc476de09b983f21cb8bb9e9f7161c
font_02_sfnt_off000109c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C5 16172 bytes
SHA-256: 7f268005b80ff82e89639affb95403f55eddb42516abbde6a76e27226db124cd
font_03_sfnt_off00011ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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