Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2e21d517aa7c17…

MALICIOUS

PDF

67.9 KB Created: 2020-12-09 21:14:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02de30894a0aa0846b62051f365f79c8 SHA-1: 1dba8c8ee8d88a4b10b920f9f0dea9ad893b2dee SHA-256: dd2e21d517aa7c1761035b4b38e5e8fceef20646fe9263e6273cf9c87f7714f4
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, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains text related to 'miniature donkey for sale', likely a lure to entice clicks on the malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=miniature+donkey+for+sale+indiana
    • https://cdn-cms.f-static.net/uploads/4445889/normal_5f9ef80339e75.pdf
    • https://cdn-cms.f-static.net/uploads/4492240/normal_5fbdce7677f31.pdf
    • https://cdn-cms.f-static.net/uploads/4377697/normal_5f8f91ed6e953.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b20e6b25-cbfa-465f-bc42-1a4d1b350f86/jonugitozuni.pdf
    • https://static1.squarespace.com/static/5fc0fd9af9866f3fd2d4d777/t/5fc40d653c6ccf69f3dd6fc1/1606684005473/tuvalelazezerigore.pdf
    • https://static1.squarespace.com/static/5fc655f22bbd7406582ba233/t/5fcc675e7ae85b53b28951b3/1607231327069/nesinokesuwis.pdf
    • https://static1.squarespace.com/static/5fc4cbdd085bf90c0e1619f8/t/5fcb172126a2be7f6dde82bf/1607145256368/sulipe.pdf
    • https://s3.amazonaws.com/ronatiduzoxij/jositawekezajome.pdf
    • https://s3.amazonaws.com/wuniku/mexico_vs_brazil_2012.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd21d2771f5d42aa23dc3c/1606230484823/poulan_2150_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/eb02291b-f6a9-4151-a9c2-c4c421dff509/waterfalls_in_nc_near_me.pdf
    • https://uploads.strikinglycdn.com/files/6630e138-93a1-4f58-a485-ba30faaee264/49982807615.pdf
    • https://static1.squarespace.com/static/5fc01ccfc14dfd36feed28e9/t/5fc559633485235c8678f725/1606769004256/jumoje.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc46.bin
3d3c531c3c51eed50d2361b5022ed2143f53278554615da2e6d855d34725e36e
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC46 5072 bytes
font_01_sfnt_off0000ddb4.bin
14d4a61f5df677d7cf1c4d9f8e239d34522ded2262ac0674a317b5db1fc348c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB4 10728 bytes