Malicious PDF — malware analysis report

Static analysis result for SHA-256 1365d4955f7661f2…

MALICIOUS

PDF

71.4 KB Created: 2020-11-18 02:18:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ccb3f365cc1c3aff3fcb64d4febe37a4 SHA-1: 17ad56bdd455dbc62d6bfc79fd233eaba978af8b SHA-256: 1365d4955f7661f24a2370ae3b21cc03d5ff2f9a7eb6cb0a4a4ffed41732bac4
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged the file as malicious, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to contain text related to a 'switch axe armor guide', a common lure for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=switch+axe+armor+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417206/normal_5f9f3716a1453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f8726be4216c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f95e8cf4de22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472475/normal_5fb2b29091ddd.pdfIn PDF document text
    • https://sajesugepila.weebly.com/uploads/1/3/4/4/134467456/xulexigugusotobemid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5fad3e90701a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474723/normal_5faa7c66a7b7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413573/normal_5f9e02154e469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5fa5929707812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5fa037182e211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476010/normal_5fa6539510f14.pdfIn PDF document text
    • https://jirukikemika.weebly.com/uploads/1/3/4/3/134310088/tofes_teregopojewa.pdfIn PDF document text
    • https://suxomaloki.weebly.com/uploads/1/3/4/5/134598925/7792295.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/fujadabez/16830198722.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_off0000d990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD990 5404 bytes
SHA-256: 681176e63a7de48662e24574dd004f3488f327f48efebf1be5ede3101dcf6b93
font_01_sfnt_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 10856 bytes
SHA-256: b0833c54f4b53708174def1289aba329c4c5e5f366621f870d63c925aea13b2b

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