Malicious PDF — malware analysis report

Static analysis result for SHA-256 367c00635cb5b423…

MALICIOUS

PDF

69.9 KB Created: 2020-11-19 09:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9eae3a2cf663522f558fe17a311170d5 SHA-1: 185d84014e2ce84749aa451e9fb1f3cc9e804dff SHA-256: 367c00635cb5b423978773d21ed551037e1149149df1c303fd33d65a27b71af0
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to PDF files hosted on platforms like Strikingly and S3. One prominent URL, 'https://trafficel.ru/123?utm_term=all+ecchi+on+hulu', is flagged as unknown and is likely part of a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/123?utm_term=all+ecchi+on+hulu
    • https://cdn-cms.f-static.net/uploads/4412757/normal_5f947e0b12f59.pdf
    • https://nujawarasut.weebly.com/uploads/1/3/4/3/134310583/5392561.pdf
    • https://cdn-cms.f-static.net/uploads/4374956/normal_5f9f3caa7c7a3.pdf
    • https://lolijejolo.weebly.com/uploads/1/3/4/4/134442146/4306485.pdf
    • https://musejeruz.weebly.com/uploads/1/3/4/7/134740211/sezaw-davaw-tokureninore-zadew.pdf
    • https://cdn-cms.f-static.net/uploads/4426971/normal_5f97fff03a256.pdf
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/3263245.pdf
    • https://cdn-cms.f-static.net/uploads/4379221/normal_5faac2989e205.pdf
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5fb2bee1f19d2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e2992a44-e1cc-4cbf-8be4-8be2e0de3b30/kefose.pdf
    • https://uploads.strikinglycdn.com/files/79d29723-0999-44de-b6f6-ac46241387c5/78479849996.pdf
    • https://uploads.strikinglycdn.com/files/f06d55f2-7282-4bff-9d20-a95a24d58982/lawutitakinuka.pdf
    • https://uploads.strikinglycdn.com/files/a792092b-e32b-49e2-b6eb-f583db02e79d/jatamoxefarewefuf.pdf
    • https://s3.amazonaws.com/zetare/59738177212.pdf
    • https://s3.amazonaws.com/dubiditiginowo/chemistry_if8766_answer_key_page_34.pdf
    • https://uploads.strikinglycdn.com/files/7f9bc577-93fd-4037-bb72-1b0fd3a32335/jopagizokasaw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d767.bin
c29d346b80c44e241395094b23d2eeea611057efec11cff11f6042e028ed1f0e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD767 4392 bytes
font_01_sfnt_off0000e656.bin
455492edff086906cdc6fc19d72b82f6764bbdbeab7f085c7f56a0f0fb77a8f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE656 10588 bytes