Malicious PDF — malware analysis report

Static analysis result for SHA-256 9457f11b6636b0ef…

MALICIOUS

PDF

74.3 KB Created: 2021-03-04 00:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1b24424532769a5eff618a5ad8397f17 SHA-1: 540a415935e5d91eb2ae3ca79c6e5c2617f1ea4d SHA-256: 9457f11b6636b0eff9f77032820bc55e27a817e68493b1509a51728345568716
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to potentially harmful websites.

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 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://xezojetit.ru/strik?utm_term=storm+front+album+songs PDF link annotation
    • https://favipipuwebex.weebly.com/uploads/1/3/5/3/135397367/e17ad6d7.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/56443163732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468571/normal_5fe8392e11438.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470016/normal_5feb9b701f6e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_602bb1f946903.pdfIn PDF document text
    • http://zedukibawubige.22web.org/87289907968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_602f9f6d313c6.pdfIn PDF document text
    • http://muluwusive.22web.org/fuxowamupezixotoxizisujol.pdfIn PDF document text
    • https://waliruwixogipi.weebly.com/uploads/1/3/4/0/134016871/4829520.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/google_search_history_over_time.pdfIn PDF document text
    • https://fafevidelaxikez.weebly.com/uploads/1/3/4/4/134481631/sigukaz-wusekigog-lofuradijeleb.pdfIn PDF document text
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/2a3845e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bapiwixobenilax.rf.gd/appeals_project_form_enugu.pdfIn PDF document text
    • http://peledopa.myartsonline.com/sikififegidot.pdfIn PDF document text
    • http://dezologukow.rf.gd/73940313827.pdfIn PDF document text
    • http://kosuvoz.epizy.com/kazaxe.pdfIn PDF document text
    • http://gujusama.rf.gd/zinajaxose.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_off0000e5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B8 5332 bytes
SHA-256: c99f21e58a679ccff98488a10dff7d895fbdbe37fe4d1cf6e9990256f1aea48d
font_01_sfnt_off0000f7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BA 10756 bytes
SHA-256: 1dc1f3565c5709ca84ce549f30ad24ff822990296ee98602ce65b2b11095aa9f

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