Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69572aa1fa78dab…

MALICIOUS

PDF

81.0 KB Created: 2021-02-26 12:15:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4aa80bc8956fe0e0406af395e0ff735 SHA-1: 38ca88952e2b866a00ec758bbfe1064301886117 SHA-256: f69572aa1fa78dab9aa275cf33126a8c0088217a589ee3c8f92758beccff1892
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which is associated with a link farm on disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to search queries, aligning with a lure to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/123?utm_term=what+is+the+3+digit+code+for+a+philips+tv
    • https://podinelejuwe.weebly.com/uploads/1/3/2/7/132710627/wivoxonokajatusif.pdf
    • https://rimudidux.weebly.com/uploads/1/3/4/5/134597050/4520967.pdf
    • http://sifulodidikit.22web.org/3948473841.pdf
    • https://gevexivojuler.weebly.com/uploads/1/3/4/4/134444242/31706f137.pdf
    • http://pafekusiwajida.66ghz.com/catch_a_fire_movie_soundtrack.pdf
    • https://xupumoga.weebly.com/uploads/1/3/1/1/131164417/senuzixajaroves.pdf
    • https://vuzupugum.weebly.com/uploads/1/3/1/4/131453250/78c79c.pdf
    • https://fokomawirofuteb.weebly.com/uploads/1/3/0/9/130969657/1286222.pdf
    • http://xufegabuxugil.iblogger.org/5261864309.pdf
    • https://musevurimimurom.weebly.com/uploads/1/3/4/7/134711136/7437ad9fbf89.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sirilagewuga/vs_code_format_json_without_saving.pdf
    • http://wijijatalil.epizy.com/drinkwell_360_cleaning_instructions.pdf
    • https://s3.amazonaws.com/wibadinavosunom/vewudo.pdf
    • https://s3.amazonaws.com/daselex/fogamepitamivel.pdf
    • http://rawuwad.epizy.com/action_blend_mu_trong_photoshop.pdf
    • http://xugidujesu.epizy.com/casual_leave_proforma_hp.pdf
    • http://tapepoxawire.epizy.com/what_are_the_basic_elements_of_christianity.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe28.bin
044441138ea303b75013bea71c2dfbea735ff93f61f6514138a83568be86c9d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE28 5656 bytes
font_01_sfnt_off00011175.bin
0a837d252a4708ff65abfe66efa24e8eae38d28149b8966042113ca907bf68c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11175 11432 bytes

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