Malicious PDF — malware analysis report

Static analysis result for SHA-256 f204d68daa24f75a…

MALICIOUS

PDF

66.0 KB Created: 2020-12-06 05:51:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d8d2b9d87092782bcd23dffaa283cf08 SHA-1: e87971f56983c1e0380173d71d570b84ca3b9afb SHA-256: f204d68daa24f75a58933ba6f8980cadb4dcf29e466658cc7ce22c940c7466f8
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of embedded external links, many pointing to disposable domains, suggesting a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/123?utm_term=frequency+mean+calculator PDF link annotation
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/komavizomi.pdfIn PDF document text
    • https://bitekiparoduj.weebly.com/uploads/1/3/4/0/134017536/gokudizejagulor_ruvaviz_sinud_nanolop.pdfIn PDF document text
    • https://muxosafexokole.weebly.com/uploads/1/3/4/4/134485240/32fa463d.pdfIn PDF document text
    • https://nopirirog.weebly.com/uploads/1/3/4/2/134234714/dozabi.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/dotiravufarad-tikomixeboluxal-lapav.pdfIn PDF document text
    • https://resedofuza.weebly.com/uploads/1/3/4/5/134503764/f60db60.pdfIn PDF document text
    • https://diwowure.weebly.com/uploads/1/3/4/5/134592565/kasufusevibuwa.pdfIn PDF document text
    • https://gepopoxano.weebly.com/uploads/1/3/4/6/134663556/6613628.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/labitajaxatufib/vixifalato.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/mowugepaxuzesonazutewila.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC743 4948 bytes
SHA-256: 1da129b28693ee2f71909c9268feb6a1456e1157b3b2642b86d83ac90d205b97
font_01_sfnt_off0000d810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD810 10312 bytes
SHA-256: 26ca097c48309c25c4a1ff837e6bab2aee3db617ca9d4e3425bf87213acd4a1c

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