Malicious PDF — malware analysis report

Static analysis result for SHA-256 332850b0e737b779…

MALICIOUS

PDF

60.2 KB Created: 2020-11-17 00:00:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5b27538cebdf53d1b814e67411c98b8f SHA-1: 547c0ced6c020f30b62eadbf168d30662b90c436 SHA-256: 332850b0e737b779fe686f18e674ccfb4ff9fb4db80e724321ef8ef9626727f5
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. One of the primary external links is to 'trafffi.ru', which is flagged as suspicious. The ClamAV detection and ML classifier also indicate maliciousness, specifically classifying it as a phishing trojan. While no scripts were directly extracted, the structure suggests a phishing or link-farming attack vector.

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
  • 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.
  • 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://trafffi.ru/123?utm_term=new+order+the+perfect+kiss+vinyl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460963/normal_5fb28b5b2ca6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450734/normal_5fa7b3e0e2a93.pdfIn PDF document text
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/rexopomutez_suzijikaz.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/kavitokolezub/80198545498.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/earth_science_textbook_9th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/60635989464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d047c7a-4f7e-4f12-98f6-6eda3cd5857a/pinojivaxik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c81b49c8-560f-4d47-a253-b712566e074b/astm_a307.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/40904731642.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/heights_morning_market_tampa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5fd74cb-a7f0-408d-aa3e-a62f52419667/78843652376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/025a9922-5de1-45b4-bbcb-b31372824d80/zane_addicted_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d75c501e-32fe-482d-bbc5-d9d9ce077cef/8790295989.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_off0000ae8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE8F 5320 bytes
SHA-256: 879da88db0ea95f61db6185db01b101f9244ec025db5c4481e31da8eb86a4d27
font_01_sfnt_off0000c0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0CE 10440 bytes
SHA-256: c48cf0f896c430b6809b7f05dfc9b4acf833fa35fe255e5a1905282484fa1982

Open this report in the interactive analyzer, or submit your own file for analysis.