Malicious PDF — malware analysis report

Static analysis result for SHA-256 1802f21cf4446c4b…

MALICIOUS

PDF

66.0 KB Created: 2020-11-13 16:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1d229dbf2746d2e1c9dc43ef8af4c0b1 SHA-1: ede887bf89f483a73a7e006d6d23bbcb0a56aa9e SHA-256: 1802f21cf4446c4b43c41b223224d801b6692bb0d06993e0727e62a452b0d8cf
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. One of the primary URLs is https://trafficel.ru/strik?utm_term=no+game+no+life+shiro+hentai, which is suspicious. The ML classifier and ClamAV also flagged this PDF as malicious, suggesting a phishing or malicious content delivery attempt. No scripts were extracted, but the structure suggests a link farm or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafficel.ru/strik?utm_term=no+game+no+life+shiro+hentai PDF link annotation
    • https://numurivigafezu.weebly.com/uploads/1/3/4/3/134390613/62e5d4294032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_5faa7d223bc89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5f9187c472cf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393220/normal_5f8f8c367dd0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_5f8c35bd90656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_5fa6d170a9dd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409238/normal_5f971c81a8ad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f99091cdc05d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5f94865a20d68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479942/normal_5fa7f72605f33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454277/normal_5fa74b422ff22.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/xipavir/biography_outline_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/sqlite_tutorial_java.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAED1 5152 bytes
SHA-256: a6cdc3c5ea83635a12f4775332400ecad4f80bd096e22324770eaf43c7ccadea
font_01_sfnt_off0000c034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC034 11088 bytes
SHA-256: 4793964fd76a0fb6705f8a59b96effcda53e444e972005f13ebdb338d8dcfb3e
font_02_sfnt_off0000e41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41B 16132 bytes
SHA-256: 895f66822cee8096b629ba52ebdbe333aa959cf625638ac8af8884b25f69792f

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