Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae0e7e57b5c8a9c…

MALICIOUS

PDF

83.3 KB Created: 2021-09-10 07:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1b9eeb8d0fcf4f7cd08a367739ab6cc4 SHA-1: 980b0a0e34abd3683078bef814d0e11849941878 SHA-256: 1ae0e7e57b5c8a9ce7f423f4d4629f3484a10c0c611d5cc37c28714eb48b4e34
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure strongly suggest this document is part of a phishing campaign or a distribution vector for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://oniceh.ru/uplcv?utm_term=building+inspections+glenelg PDF link annotation
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f977d84e6a---54329910333.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/nilopanazu.pdfIn PDF document text
    • https://ocw.tw/uploads/files/91588740694.pdfIn PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/gasejanaketedowapopevem.pdfIn PDF document text
    • http://sireny.net/share/files/nodamewegexubewemokufoke.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/57370138839.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/42580564208.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/gusimusogimesubu.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/debiru.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132fad523755---vinefoxukopuruxow.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/16435345644.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/63582985518.pdfIn PDF document text
    • http://nattukoottam.com/userfiles/file/23532396301.pdfIn PDF document text
    • http://ecole.ru/text/images/file/75774535814.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/witusuvifuwil.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/filuwerafetided.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f5021f4b3---11010195725.pdfIn PDF document text
    • https://rajatotogroup1.com/contents/files/pufedakerawesokuvowifezu.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/e09f8ac016205e8d0a39d488b8f9f30d/sefimizasulizez.pdfIn PDF document text
    • http://cy2hand.com/userfiles/gelixorubu.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/mikoxamotato.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/5311931643.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/juzokuzutuwo.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613abd3a0779b---fibabuvotol.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://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_off0000df0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 18396 bytes
SHA-256: 964690f9935a6a3d1816f87f6a9170ac9d9372a207985438c4c6b67dea21facb
font_02_sfnt_off00012744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12744 10580 bytes
SHA-256: 3a696ba5d738ef7fa52d30e20a1812fd1d03d7a16455d4167ac5ed816c7607f7

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