Malicious PDF — malware analysis report

Static analysis result for SHA-256 368aa0289ba85b6c…

MALICIOUS

PDF

58.7 KB Created: 2020-12-19 01:54:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ce638f497f98700c10e6350766f0bd76 SHA-1: dcbc08f652467598ea05e743ed8472ea66171800 SHA-256: 368aa0289ba85b6c1644d8170692f6fa0671add44bb6dd41b55d5efe95bbc31e
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://traffking.ru/strik?utm_term=honda+eu3000is+repair+manual'. It also exhibits a PDF link farm behavior, with numerous embedded URLs pointing to various PDF documents, likely as a method to obscure the malicious destination. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=honda+eu3000is+repair+manual In PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/e6c2b23fa84a1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482880/normal_5fc3d9ed67e80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419826/normal_5fc7622f0b778.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/xisilebisisod.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/58c603e0-7348-404e-9a09-4e89eff44039/electrolytes_worksheet_answers_page_72.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53be8046-63d9-4d0a-a4c0-f06f8e7fc925/sowatofudoxibulezadu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a3020b6b03258f5599b8/t/5fc816ad7ff5a343ebe6d8b7/1606948528433/alone_pics_with_quotes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc34462ab79f442f238dc9b/t/5fcdd86b74a40730fbbad7cb/1607325803966/fish_tank_video_in_tamil_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95ef070-77bf-42b2-9d6b-916b6ea69523/solar_oven_research_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41567b66-1208-4e78-84a6-0f70f6a27813/45506582724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06be091-8921-4b62-82f9-19846b7b02d5/charlene_full_metal_jacket.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_off0000ab27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB27 5372 bytes
SHA-256: 08791c3a0ed999b3be26b2c3b4f5dda161b056b9af1fa4c2af00d578d5012099
font_01_sfnt_off0000bd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD4B 9716 bytes
SHA-256: d79f4a63016f0c18119ed2077b7db942e5f3688c4e76c7c9215313d146231742

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