Malicious PDF — malware analysis report

Static analysis result for SHA-256 2064f7ef287e8f5b…

MALICIOUS

PDF

95.4 KB Created: 2021-02-21 18:54:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dda4e285de05f3551f73e103c8193c1e SHA-1: a87fe9c8b9e0f2a4336df319fb1e22329ed136a4 SHA-256: 2064f7ef287e8f5b92be32404b60ecdc998cb6bdd8a424518e4b41af07de8370
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links pointing to disposable domains and Weebly-hosted PDFs, suggesting a link farm designed to redirect users to potentially malicious content or phishing sites. The presence of an embedded URL and the nature of the link farm indicate an attempt to exploit users through indirect means, possibly leading to further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=viktor+frankl%2527s+logotherapy+the+search+for+purpose+and+meaning PDF link annotation
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/denolazasoriwexakej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467576/normal_5fcb63a528d5b.pdfIn PDF document text
    • https://janepaxe.weebly.com/uploads/1/3/4/0/134097288/7249589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_6031883487fa9.pdfIn PDF document text
    • https://mibivatoroxup.weebly.com/uploads/1/3/4/7/134762409/1055209.pdfIn PDF document text
    • https://zaluvunikuf.weebly.com/uploads/1/3/1/0/131070459/tikogigiwidoz-zozekisitapa-sevuxaviz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454170/normal_5fee1045845f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495395/normal_5fc8ec2510080.pdfIn PDF document text
    • https://fejurisikem.weebly.com/uploads/1/3/0/7/130740008/kapiruxuv_fagaguserivo.pdfIn PDF document text
    • https://sevirisedug.weebly.com/uploads/1/3/6/0/136089940/0b4f3a98c950f5.pdfIn PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/3692626.pdfIn PDF document text
    • https://kewisivi.weebly.com/uploads/1/3/2/6/132681156/lilugopezelij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_601ee7b8ca295.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/xubovewuvipo.pdfIn PDF document text
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/40d1f3b4c0c59.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/pululusodogi/bitdefender_antivirus_free_2017.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_off000136d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D6 5736 bytes
SHA-256: 0050d4701bec2fbac825f39f17a4d3f54cf34c3a4c7d92bd8a05eb45206f3a89
font_01_sfnt_off00014a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A4C 11096 bytes
SHA-256: 42c8beb8da96d40a87dde27bd16b049592931799ff0cb68d78a1e09512814d59

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