Malicious PDF — malware analysis report

Static analysis result for SHA-256 01406773f65570a6…

MALICIOUS

PDF

79.7 KB Created: 2021-04-01 06:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b6a07297b93758a51e34dd895802e744 SHA-1: 3d2325836b76872a2d5d6fdb289681774f0ee1bf SHA-256: 01406773f65570a6857bd9b0340e33052d48a7f6f0cd1fec1b269a643ce51fd3
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a machine learning model. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document attempts to trick the user into installing a browser extension or update. The embedded URL 'https://crophysi.ru/award?keyword=best+pdf+reader+and+editor+for+linux' is a strong indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • 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://crophysi.ru/award?keyword=best+pdf+reader+and+editor+for+linux In PDF document text
    • https://zokofefedepop.weebly.com/uploads/1/3/1/4/131437243/faxelojukenuviw_devisebatoxi.pdfIn PDF document text
    • https://jukaninigureze.weebly.com/uploads/1/3/0/7/130738482/jomem-gewukuxil-momogu.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480590/normal_601a01ab7416d.pdfIn PDF document text
    • http://ecoterritory.store/rorawifemolodetaziwp1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470975/normal_6034d45775f3a.pdfIn PDF document text
    • https://sikiwakasizo.weebly.com/uploads/1/3/5/3/135318116/jipujivawares-fomid-tobatax-derelijutak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473902/normal_5fedcc37800ad.pdfIn PDF document text
    • http://zhigina.ru/waxum7ji8r.pdfIn PDF document text
    • https://munemajof.weebly.com/uploads/1/3/2/3/132302982/fekorufekaraxasuzel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456996/normal_6030672a9090d.pdfIn PDF document text
    • https://kurasapar.weebly.com/uploads/1/3/4/9/134902571/9963220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_6028771275eba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408170/normal_5fec88de75bf0.pdfIn PDF document text
    • http://suruwafid.22web.org/6010777290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_602e4308784d6.pdfIn PDF document text
    • http://tortomsk.ru/reridufspck9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_6009f68322623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384050/normal_601de6287de35.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/risalenefazozo/safutozafinexamufe.pdfIn PDF document text
    • http://rijogutigoxek.epizy.com/lufawax.pdfIn PDF document text
    • http://vatujub.rf.gd/87814947574.pdfIn PDF document text
    • http://kulotobokibipez.epizy.com/one_ones_other_another_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/dabazinebotafusurusumedu.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/genes_and_chromosome_mutation_worksheet_answers.pdfIn PDF document text
    • http://pizenove.epizy.com/32242171840.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_off0000faa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA8 5152 bytes
SHA-256: da29327e8c83da322b157594ef6de895f44e90e16f4e803fbe4eb256caca2324
font_01_sfnt_off00010c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C49 10996 bytes
SHA-256: 0a75811aed19bf03d0974aecc033fd68d8ec4336763de8f9e963d1cf8d61eea4

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