Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e305636a3bb58ef…

MALICIOUS

PDF

69.8 KB Created: 2020-12-17 21:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 33f98d68f3ab1243e4781e781610223e SHA-1: 7297e50043a3b60c16f0806c8b4b9259d4952aee SHA-256: 5e305636a3bb58ef79dfb6e14e168a5448e0bbf2fe4a881b1f2a570c835ddcb0
214 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 'traffking.ru'. Additionally, it exhibits a PDF link farm, with many embedded URLs, some of which are confirmed benign but others are unknown. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://traffking.ru/aws?utm_term=aseptic+technique+microbiology+pdf In PDF document text
    • https://norudajesopoz.weebly.com/uploads/1/3/4/3/134340776/4493712.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc50aa38139af03765fbccb/t/5fc51e44173fb5383b47194a/1606753860952/darklands_game_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f2670a2757459bfcd987/t/5fc772d3a907d7439cdb9f06/1606906579900/sodavebejufazezosuxukug.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/3d_analyzer_pc_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/answer_to_the_universe.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/vaaste_album_video_song_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0028ac14dfd36feec75cc/t/5fc0eb199b1ed03538fce867/1606478617423/minto_brown_park_map.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00570a3bf4b14aba44e61/t/5fc166a7645712565470bd7b/1606510251202/bakelazuwatiminevaj.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/applied_mathematics_3.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_off0000d1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D5 5716 bytes
SHA-256: a0df317e080866778d2051e4970fc899d180c7fb51ad43b0c52d5402c803488d
font_01_sfnt_off0000e51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51D 11008 bytes
SHA-256: 67809c56d774d0cc2e15c7e7754ae86acdc211d4de3ffd59d1501f5986053dbf

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