Malicious PDF — malware analysis report

Static analysis result for SHA-256 0887e53f10e50248…

MALICIOUS

PDF

66.2 KB Created: 2020-12-07 01:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5cfb85fc799ba4cef25f879256236eda SHA-1: d62543c30ad9a769ca6c892b126fcef2e4a2811a SHA-256: 0887e53f10e50248b57b03b0cee40904bea8f9a435fddb6878de54bba1c9e864
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/strik?utm_term=mercon+v+transmission+fluid+near+me PDF link annotation
    • https://wefenofutote.weebly.com/uploads/1/3/4/8/134873272/fewili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_5f98db3a71687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424347/normal_5fab70f9bbdb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_5fbcba14d9fb8.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/bukugiwotor-fitedo-puwafo-wonowudamog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407331/normal_5f9f1d96ada53.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/jasadavebaga/6594740804.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/rumav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1935e75-22e8-4d46-a4b0-762472408889/ridakomi.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/puwigoxedixarinolisevu.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/nick_young_championship_ring.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/oracle_iprocurement_user_guide_12._1.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_off0000c86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86F 5232 bytes
SHA-256: b8388400bf0bf0a792d51687024a8076a4efe4e6a582444e3357e351802a2389
font_01_sfnt_off0000da37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA37 9824 bytes
SHA-256: bb4ea14bef0bfb72b5d2089edd4ea505c0ec6e7bf5dc65b8516e6f79a4e4cb21