Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb5d6a062816129…

MALICIOUS

PDF

64.1 KB Created: 2020-12-25 08:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 10441e69152ad400bac113b7a96a4d56 SHA-1: bc19ed76447611bff07b8ec39be6d18fa4e71c01 SHA-256: dcb5d6a06281612959281e8ecf53d231e59207e04375d106a887ac5d2270852a
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate it's a callback phishing lure, prompting the user to call a phone number related to billing or subscription issues. The embedded URL, https://trafffe.ru/strik?utm_term=usa+today+subscription+phone+number, likely serves as a redirect to a malicious site or further phishing infrastructure.

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/strik?utm_term=usa+today+subscription+phone+number PDF link annotation
    • https://wupebeziwemipi.weebly.com/uploads/1/3/5/3/135315897/gisuzunus.pdfIn PDF document text
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/juguzoj.pdfIn PDF document text
    • https://cdn.sqhk.co/toralapiluw/ggHjbhd/smashy_road_2_key_clown_car.pdfIn PDF document text
    • https://poxaneduwi.weebly.com/uploads/1/3/4/2/134234601/b4041e2a1b8351.pdfIn PDF document text
    • https://jerefukixuludew.weebly.com/uploads/1/3/4/6/134686450/e6ac8c9ad0d.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxumududu/0jjfvEo/monument_valley_3_download.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/tobobowu/vuxufavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8abe91c-5406-4ac6-a817-e84e279ab3bd/76696164930.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/roblox_exploit_executor_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed46816c-760b-41c7-8e1c-b763c0367af2/world_history_answers_keys_final_exam_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd53cd2f-3ceb-4b60-bb7a-a90958d0114d/princess_aurora_costume_baby.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2519da83-0e40-4d15-be8a-6538e7a1624b/csi_web_adventures_case_3_answer_key.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF5 5516 bytes
SHA-256: eb1affd338bd219b1b4635bccc710728325266d98739d70e5b08d7657bb70a9a
font_01_sfnt_off0000d28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28B 9764 bytes
SHA-256: e147df92acdd3a6600807abb978e49920a844bcf6ee3de62ee2f65713e630cd9

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