Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6ef22d46f7bcbe…

MALICIOUS

PDF

106.8 KB Created: 2021-01-13 07:58:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 4d340d12293c6de08f66de83bd205192 SHA-1: e2feb64c5e88e090e583d50129b57588b3c75b13 SHA-256: 2b6ef22d46f7bcbe7aa72c9395aeefa64ab9c0f3e2e9318e9318d7e6d0a2bb28
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure, including the critical URL 'https://traffmen.ru/aws?utm_term=jordan+normal+form+example+4x4'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=jordan+normal+form+example+4x4 In PDF document text
    • https://cdn.sqhk.co/difixoruze/hjjgBnT/94526978645.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f8b7f37a4a63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490930/normal_5ff0b8d87a234.pdfIn PDF document text
    • https://jumozavuna.weebly.com/uploads/1/3/4/5/134598597/5196272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_5f891dfe55c3f.pdfIn PDF document text
    • https://site-1172175.mozfiles.com/files/1172175/cake_divider_inserts_for_baking.pdfIn PDF document text
    • https://cdn.sqhk.co/fufejapopunu/jljbjja/paralyzed_stomach_causes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f8cc4b19f392.pdfIn PDF document text
    • https://site-1176800.mozfiles.com/files/1176800/30250042242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407804/normal_5f97e2eb6ce9a.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/muwemivumazulax/autodesk_sketchbook_pro_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/charity_water_annual_report_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/heart_failure_treatment_guidelines_nyha.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/catia_v5_tutorial_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/dispel_thick_bleach_safety_data_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14476 5152 bytes
SHA-256: 76b472c50ebc4e880a4a71d5e710dbbc8ff2f5722ef25d0b1502fb01cbc7eeb1
font_01_sfnt_off000155f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155F8 14592 bytes
SHA-256: 1a5647252a6b3b105e9b46922528d4f0493b1d59d9313856f58334f4a958c36c
font_02_sfnt_off00018640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18640 16808 bytes
SHA-256: eedb48fc2a3314f78244529787342052add6578e165d3b9fc535e38dece5e88b

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