Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ec5f4316bc49fd…

MALICIOUS

PDF

65.3 KB Created: 2020-11-30 09:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a92c16abfb7e8dbec1a6a4492ac1312c SHA-1: 210660cea8fd3b83d3876f0b0203321c9a93bc5b SHA-256: 92ec5f4316bc49fd8fb94e90eb9fc0fdb866113c5cbffb12c493bb52d7fecc8e
154 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 'traffmen.ru'. ML classification and ClamAV also strongly indicate maliciousness. The embedded URL is likely used to lure victims into clicking, potentially leading to a phishing page or a second-stage malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=intro+to+stoichiometry+grams+to+grams+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448986/normal_5fbb20cfe1b9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402948/normal_5f919ad27dd9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463560/normal_5fb71ed337aec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f8abdccdee75.pdfIn PDF document text
    • https://mizewipexu.weebly.com/uploads/1/3/4/6/134609608/7018573.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369900/normal_5fc47c8dcfe84.pdfIn PDF document text
    • https://japiloxekafu.weebly.com/uploads/1/3/4/4/134480389/tubelawubizime_bunomupuwax_xozevikesufi.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/97734ec0-5ad8-47e1-aec3-27ad54411ac0/bowflex_ultimate_1_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67122f3a-70d5-464b-b9a6-83e56502d5a9/rokireg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee6b57d1-6e03-4d34-a664-b8715ab44d80/14123529192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de671cd2-ab90-4acf-b19e-2fcc0d6dd89b/14433398128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c704407-a384-4acc-b82f-7a136273d0e6/village_of_huntley_police_department.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f93f27-a9bf-4fdd-b210-153f8676a131/bristle_worm_trap_australia.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_off0000c20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC20F 5376 bytes
SHA-256: 5852330e1ef71790bf6e1be741c08b21d6326cb6bc1de65a80daea0247a2f13a
font_01_sfnt_off0000d44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44A 10012 bytes
SHA-256: 678cf0a5c0d3d75de094459a90f01f0cb865ea6ccc6a30c76b1378d76761552d

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