Malicious PDF — malware analysis report

Static analysis result for SHA-256 df801942e547258b…

MALICIOUS

PDF

112.5 KB Created: 2021-03-31 22:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c8af4f88826a931b7e20f1186d554fd8 SHA-1: db9ff703f525f25e232265239af2c74c6cc560e8 SHA-256: df801942e547258ba5270183c3e77fff7ec1cd6d9f638320112453b4ea6dab36
126 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the malicious intent of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=manual+de+discipulado+asambleas+de+dios+pdf PDF link annotation
    • http://kawafopi.mygamesonline.org/3695414565.pdfIn PDF document text
    • https://vasigigu.weebly.com/uploads/1/3/4/6/134607878/punekasisotajolesivi.pdfIn PDF document text
    • http://pearhaidhr.fun/lease_accounting_journal_entrieskwr57.pdfIn PDF document text
    • http://canlisohbetim.net/the_secret_river_andrew_bovell_quotes2our5.pdfIn PDF document text
    • https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/nezavoduboba.pdfIn PDF document text
    • http://webdefilmizle.com/60263468056dkqt.pdfIn PDF document text
    • http://vofanepukasur.22web.org/25868729921.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/alban_berg_lulu.pdfIn PDF document text
    • https://cdn.sqhk.co/mezugifosa/Bhdycie/lunorujakalunuxed.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/how_many_molecules_are_in_1_mole_of_sucrose.pdfIn PDF document text
    • http://bijukexamova.scienceontheweb.net/nuxujelituza.pdfIn PDF document text
    • https://vexuneka.weebly.com/uploads/1/3/4/5/134584550/difimufagonuti.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/higi7jd/freedom_five_board_game_kickstarter.pdfIn PDF document text
    • https://noragunefide.weebly.com/uploads/1/3/1/6/131637841/kupisuxejisome_fawupanive_rapamom_volosil.pdfIn PDF document text
    • https://gukudobubutagen.weebly.com/uploads/1/3/5/3/135306914/028981c0c449df5.pdfIn PDF document text
    • http://tegubija.mypressonline.com/job_offer_letter_sample.pdfIn PDF document text
    • http://cherrypimp.online/762241917813dhzd.pdfIn PDF document text
    • http://hookup753.fun/272294576750tqvp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ribafaga.rf.gd/ascomp_secure_eraser.pdfIn PDF document text
    • http://nemenarubaz.atwebpages.com/nemimob.pdfIn PDF document text
    • http://migisopipa.epizy.com/38454484027.pdfIn PDF document text
    • http://fupuzujovo.epizy.com/css_reset_stylesheet_2019.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_off00017ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AE5 5348 bytes
SHA-256: 2869b10681053bddd240cd8df673ed92c2e6115a297f4b5d1f8dec1c190add99
font_01_sfnt_off00018d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D10 12272 bytes
SHA-256: 79c8238371ad9d3465b0aabffc8c3e407a324a3553b9756a3297c7401b266d03

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