Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7e7ee4531d27cf…

MALICIOUS

PDF

69.3 KB Created: 2020-11-11 16:35:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 09da412d94e5427e9c8141887bde1b23 SHA-1: 99fc538a3665ffbdc6b1300b49eb7a0a9c0e5d52 SHA-256: 9e7e7ee4531d27cfe5e69c5e11c406df28732b6b7870f55dd85fc01ed2dcb110
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/123?utm_term=theme+of+a+very+old+man+with+enormous+wings PDF link annotation
    • https://pibemalogodozod.weebly.com/uploads/1/3/2/6/132681910/ziguramumuzixutesesi.pdfIn PDF document text
    • https://sijidipej.weebly.com/uploads/1/3/4/4/134483730/nazad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f87d62fa2efd.pdfIn PDF document text
    • https://wenilitedosi.weebly.com/uploads/1/3/4/3/134315728/1891477.pdfIn PDF document text
    • https://rilokudewagozem.weebly.com/uploads/1/3/4/5/134597993/wusetonirurure_leziwawo.pdfIn PDF document text
    • https://tosisevutozu.weebly.com/uploads/1/3/4/3/134328017/a2119.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/wizuluworafid/79012161222.pdfIn PDF document text
    • https://s3.amazonaws.com/tekujel/two_examples_of_seedless_vascular_plants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a265eb12-43de-41c9-9180-11e329a6d107/2099534441.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/falabot.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/6850098973.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_off0000d41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41C 5524 bytes
SHA-256: c7bceef4d8312cc97739c867b70a3ffc0b1ff078853946ce30d944abddc0d158
font_01_sfnt_off0000e6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D7 9300 bytes
SHA-256: 7fe9c43cc0603e50ee8e45272ec33b05553183c45aa6234c116821b410045e1c