Malicious PDF — malware analysis report

Static analysis result for SHA-256 235056bd318f35f4…

MALICIOUS

PDF

70.5 KB Created: 2020-11-25 08:58:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 62f8580ab3ac8c7d5607416f12560e34 SHA-1: 17bc440760dd222688ade15e609e0890f167426b SHA-256: 235056bd318f35f48050ee51c31cd49e9ee40d2f42904dbd04cbe1cacc589f90
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically `https://traffine.ru/aws?utm_term=parts+manual+for+whirlpool+refrigerator`. ClamAV also detected the file as `Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0`. The document body, though heavily obfuscated, suggests a lure related to a refrigerator parts manual, consistent with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://traffine.ru/aws?utm_term=parts+manual+for+whirlpool+refrigerator In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_5fbc88ac5cf7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376601/normal_5f8e1bca2aa3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f93ac37a64b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5f9707fe7478a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394062/normal_5fb01e947743d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368788/normal_5f89fc9c0528e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_5f8af73159df5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455374/normal_5fb4e6e840848.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f07bed5-2abf-4b72-be79-b6bde3ea48e5/20856431054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/522b0709-b158-49e6-b2a2-487392725106/47845509642.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/aaja_mahi_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c365ad5b-c841-4552-ad40-b8235b18fb36/carey_organic_chemistry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/090cdda8-d8c0-4bbf-ba2e-c396d62a048c/suletasewofonusezotupitu.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/16674119656.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_off0000d597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD597 5408 bytes
SHA-256: aaaab13439d5462020f69753b591aff8512d807c1f8922b7113fb280199cbf21
font_01_sfnt_off0000e7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 10940 bytes
SHA-256: 0af289530ff1017934672a55a4d7505a39e309c309c8712621ad6c224809ecd4

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