Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9fea5a1a4d446b…

MALICIOUS

PDF

74.0 KB Created: 2021-09-23 22:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 3ed6d7a942d3bd1ec167ef6426379d90 SHA-1: 3541fc72fffa1f06b976cb4b1c9e7ee9e9580541 SHA-256: 8d9fea5a1a4d446bbcd75133f5604a02dab4d9d10633d1f5cc42c051b4917c55
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The PDF contains numerous external URIs pointing to disposable hosting, indicating it functions as a link farm designed to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and URI patterns strongly suggest an intent to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crewmak.ru/uplcv?utm_term=double+dragon+trilogy+apk+free+download PDF link annotation
    • http://savalis.ru/userfiles/file/dimuzazisesatifiwoz.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/ab4f49cb78cba124439bfeb1a339837e/43250450700.pdfIn PDF document text
    • http://alocainghien.com/uploads/userfiles/file/21475726390.pdfIn PDF document text
    • http://sofupingame.com/calisma2/files/uploads/vetafatefawukiwidepesufo.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/zaruza.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fawofixawu.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210907181204890067149.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/leroguv.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/makelosumajigezukozupi.pdfIn PDF document text
    • http://eternoohydro.com/d/files/93294953388.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/xovifi.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/45029961938.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613760a3b16ff---gukuvofewesaxuvaterofegoz.pdfIn PDF document text
    • https://shreegroupco.com/userfiles/file/rugisakulomepawafu.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/mumipawexokilalupi.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/10102396650.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/47079663803.pdfIn PDF document text
    • http://robedecreateur.com/img/files/kegutuwulexijowen.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/zomatezuzirevupodezeja.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/26618417341.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8C 17848 bytes
SHA-256: b4289cc42f8722d15a5b78e8ebaf4b81b19e297587143a7cf31ba6885d9340fe
font_01_sfnt_off0000e924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE924 11040 bytes
SHA-256: f6e99b56c72d283a218c2bec5ddf5f83d56cc085dbbf62bf5ac2380bf22228da
font_02_sfnt_off00010291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10291 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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