Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3dd5a8bc4850f76…

MALICIOUS

PDF

74.0 KB Created: 2021-01-25 04:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e9bb56c43c3d5a18f2aefb1a5c1a1b7a SHA-1: ed6740fc3848b896c65a0dc663fd86a96896b639 SHA-256: c3dd5a8bc4850f761d70baa7f55d498af8d1a5d1384330e5dc90672da057812a
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious sites.

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://leonvi.ru/123?utm_term=dog+coughing+up+blood+cancer PDF link annotation
    • https://mejavepo.weebly.com/uploads/1/3/1/4/131438157/8978794.pdfIn PDF document text
    • http://deutschebank-meine.com/wepoborevufevezujof2dszf.pdfIn PDF document text
    • https://ribovaboj.weebly.com/uploads/1/3/0/7/130775049/8902105.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/hdafFhj/battery_operated_lights_walmart_canada.pdfIn PDF document text
    • https://gapivawaki.weebly.com/uploads/1/3/1/8/131857152/602926de.pdfIn PDF document text
    • https://cdn.sqhk.co/xidosisew/ighbkI4/81528495832.pdfIn PDF document text
    • https://seporulakokifo.weebly.com/uploads/1/3/4/5/134590723/29c8be436f46b.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/fgirgfT/venmo_login_online.pdfIn PDF document text
    • https://viwifigejemi.weebly.com/uploads/1/3/0/8/130814408/lujetudumukavu-pilogume-xuzexet-nudigu.pdfIn PDF document text
    • http://vabakavolageni.22web.org/offline_synonyms_dictionary.pdfIn PDF document text
    • http://center-about.com/rojipetiwexejaruvn7cp.pdfIn PDF document text
    • https://cdn.sqhk.co/sisuriwul/jjbeXjh/zugetemigobave.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/idjbBSs/asphalt_nitro_apkpure_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gekazez.epizy.com/52654016977.pdfIn PDF document text
    • http://tudifilik.rf.gd/tuvuwovajipirek.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_off0000e721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE721 5296 bytes
SHA-256: de7532c9de67c1e65035c832f5acb40fbd51f5fefb4d23b11278f6399627d81d
font_01_sfnt_off0000f91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91A 9904 bytes
SHA-256: 54018f8fe245fbb8ea3754dc729cd793e8b81b2e0d443144dd5927a5e5ac72e2

Open this report in the interactive analyzer, or submit your own file for analysis.