Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0abc7eea9bd63cb…

MALICIOUS

PDF

87.4 KB Created: 2021-09-02 07:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fdb3ec40c17163a02d37cda2ef5c50f4 SHA-1: d96725761e7a97b6df94377886337509939381e5 SHA-256: f0abc7eea9bd63cb8a1cc6f097da92b894cabef01337f080805004a4549b2015
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. The primary attack pattern involves exploiting user trust in PDF documents to lead them to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://zegabilisim.com/calisma2/files/uploads/vojiwixubepope.pdf In PDF document text
    • http://ikoi-es.club/yamituki-n/uploads/files/kemabaratobezefomoluza.pdfIn PDF document text
    • https://energooptima.hu/upload/File/kadafozexidunew.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/74ab85d554450d67c2076f7411124551/meweregevusesabale.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/qfvaj0sk0837a4gg0q0ib7q10a/jivinatovot.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e7cf3ed6f---ratopenexo.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/42433825794.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609451724fe82---62744399512.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/derofixobefivet.pdfIn PDF document text
    • https://sinarwaja.com/account/files/26001182165.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/lekogoxelolukutusunawel.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/kitepu.pdfIn PDF document text
    • http://vodnik48.ru/content/file/64723094106.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20210702_013330.pdfIn PDF document text
    • https://vietspices.asia/uploads/files/dovibimilefugimewojixewol.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/tixisitulewagumel.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e756a97d9---45924863352.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105cd8451852---13618897513.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/xinejeviluvopiri.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/vefaposezewugof.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161260c5a7ba81---75441423433.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/5c1f9dc4175176dba38b1ca114d52f5b/zofepalafekizitub.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160982ef036281---simafifulumonemizazi.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/5735424316.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=double+integral+exercisesPDF link annotation
    • 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_off0000eb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2F 18932 bytes
SHA-256: 365e3386119b77c4410e13867e7a7c5f9fa87940a3ee9066c172df1599c8bec8
font_01_sfnt_off00011d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D20 10748 bytes
SHA-256: e230e27ba0b48408071a900c68dad3e48da8317d629992843de167810dabea2d
font_02_sfnt_off000135fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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