Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c54a764730f861b…

MALICIOUS

PDF

75.8 KB Created: 2021-02-19 23:28:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01b948a88cb1ee4962df9727866257e9 SHA-1: 325b432e3bcc6f346e3b8651b04dd357c56834fd SHA-256: 0c54a764730f861b87f3dab1fe847a80c5bffbabc463afe6f0aab179b4a721b8
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, further supporting malicious intent. No scripts were extracted, but the presence of many external links points to an attack pattern involving directing users to potentially harmful external resources.

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://jottigo.ru/123?utm_term=watch+the+motorcycle+diaries+online+free+english+subtitles PDF link annotation
    • https://tusixifowidafoj.weebly.com/uploads/1/3/1/4/131437116/lovudinuk.pdfIn PDF document text
    • http://puwaxevajineluk.iblogger.org/a._c._synchronous_generator_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5fedea576f1b0.pdfIn PDF document text
    • http://gojuvop.iblogger.org/23652978933.pdfIn PDF document text
    • https://nakilogizo.weebly.com/uploads/1/3/4/3/134363069/fajanir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458413/normal_5fcb6f01ab46f.pdfIn PDF document text
    • https://newavutija.weebly.com/uploads/1/3/1/8/131871734/5993e19aadf.pdfIn PDF document text
    • http://sokorimelizopa.iblogger.org/bonifoluvifevonogefaxupa.pdfIn PDF document text
    • https://fupotepalakeb.weebly.com/uploads/1/3/5/3/135351483/5484082.pdfIn PDF document text
    • http://xenuven.22web.org/gobop.pdfIn PDF document text
    • http://zupezejukiselu.22web.org/84124458399.pdfIn PDF document text
    • http://remontlegko.info/2025072113nz1zv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444866/normal_6015ff26eeb42.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://josekopiguvalup.epizy.com/bhagavad_gita_word_to_word_translation_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/aladdin_2019_4k.pdfIn PDF document text
    • http://nafivinada.rf.gd/html_css_class_attribute.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_off0000e8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EA 5692 bytes
SHA-256: c8f87a83f51eb4e1ae38b803a4c27fef1033da47cdc2d885b783360a89473975
font_01_sfnt_off0000fc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 10996 bytes
SHA-256: 857fd0197d709bff5bff54ae68e7b88deabd3e7f467060dd4759aa9b1c5d570f

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