Malicious PDF — malware analysis report

Static analysis result for SHA-256 d727c28923e70ab7…

MALICIOUS

PDF

71.2 KB Created: 2021-03-01 00:59:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: b7fd33df6f71c3b6751b6c208e6c9157 SHA-1: 88fd929b4a3bb730d641cf2c6ce2f8f8b5de24e1 SHA-256: d727c28923e70ab7dd800bf62e82b6a2340661a8d3ec9fe48ad68bc738bff92e
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains multiple embedded URLs, with at least one, https://mezovuduw.ru/wix?keyword=rocketfish+ws01+manual, appearing to be a lure for a manual search. The PDF structure and embedded links suggest an attempt to redirect users to potentially malicious sites for phishing or malware delivery, aligning with spearphishing attachment tactics.

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://mezovuduw.ru/wix?keyword=rocketfish+ws01+manual PDF link annotation
    • http://55571.ru/kazotilexudexazi2enf1.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/talesukejubutosuretidulumeyo8s.pdfIn PDF document text
    • http://poopo.ru/5088896741149tjl.pdfIn PDF document text
    • http://zoxovimukanig.22web.org/26995990575.pdfIn PDF document text
    • http://rineset.xyz/electricity_and_magnetism_downloadww3pk.pdfIn PDF document text
    • http://muldwych.com/251087893795ur9.pdfIn PDF document text
    • http://littlenat.space/42550349029l7k3.pdfIn PDF document text
    • http://xekuluw.iblogger.org/97936599440.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fosawef/media_creation_tool_windows_8._1_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/treaty_of_guadalupe_hidalgo_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/ruwafi.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/heropanti_full_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/automobile_engineering_final_year_projects.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD37 5264 bytes
SHA-256: 11ef6b13c50036038625b52978a4dcf19d42b1207de4495bb9e5f53024b6c76c
font_01_sfnt_off0000df0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0F 10328 bytes
SHA-256: 117828540aa334ad3458c903d101d9d8b65baa04e2dfe6d18146b2c93241155e
font_02_sfnt_off0001026f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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