Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a2d2d42654e05a…

MALICIOUS

PDF

73.0 KB Created: 2020-12-31 23:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 968f0b9e6dbfe4bbd20e4448b313bf04 SHA-1: 96b66911f5c7a6de3c38f95fbd471f3e075a195c SHA-256: e2a2d2d42654e05ae4b218f01d64fc7f01a905a811d2e959e45079d651c6d176
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing numerous external links, with one pointing to a suspicious domain 'trafffi.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the structure and URL patterns suggest the PDF is designed to lure users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=entergy+louisiana+billmatrix+phone+number PDF link annotation
    • https://pepomujotopulog.weebly.com/uploads/1/3/4/8/134873529/medurulu.pdfIn PDF document text
    • https://wuzafonufiza.weebly.com/uploads/1/3/4/3/134341979/5904943.pdfIn PDF document text
    • https://mufisifarugevap.weebly.com/uploads/1/3/4/5/134595961/sanegan-fubag-kabowufidilefet.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lorewuk.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/gCgcidp/duvikowozuwusu.pdfIn PDF document text
    • https://xegejibizagufom.weebly.com/uploads/1/3/4/8/134851168/4810307.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/sonevakuvaniwativu.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/wixatax/tofawabuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ceb7b5-585c-45a3-9b7e-13da02088b7d/animal_tissues_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/834807a7-5921-4c73-91c5-1a692289f778/xobivisugilaz.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/84077540181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/474af508-3369-48b5-96ce-72d2f24ece79/11974208908.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/az-_100_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc0c2485-0eaa-4d51-9fe5-4e178bb21933/bayesian_methods_for_data_analysis.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_off0000e1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 5500 bytes
SHA-256: 701527d9b06c1f68225a2517e24a5279bdccb1bff050661ce352dc84b2e129e7
font_01_sfnt_off0000f456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF456 10220 bytes
SHA-256: 5475bc3c9b37b4da626b010f9cd8124b94cb8af9848eee1736c249388fc67e2d

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