Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc468e62834718a…

MALICIOUS

PDF

88.6 KB Created: 2021-09-03 13:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e861352f8a0ab93b543d70cd6672c481 SHA-1: f3fdfed677e16133cac91fa779b078a7f8675c7d SHA-256: 5bc468e62834718a7d02860c76966f26308235f2be996a8a92d0b4e311ce7eb2
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve as lures to phishing sites or downloaders for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://philabc.ru/uplcv?utm_term=butterball+professional+series+turkey+fryer+manual PDF link annotation
    • http://enotecagaribaldi.it/userfiles/files/lakelipagavudin.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/14088064499.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/jpms6kq87nl4qntolm3hq5dpr4/sutijolipuzaki.pdfIn PDF document text
    • https://www.micron21.com/application/third_party/ckfinder/userfiles/files/78273815174.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/63422202842.pdfIn PDF document text
    • http://jongauger.com/userfiles/file/fuvodojopevez.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/3305684171.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/gpc9thnn51gke2p0j9echgpbf9/lelunesiwulusanudusit.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/50d49003ae6bad24b97d7a0a961db82c/32576745739.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/97430950518.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/galesukujinivogexiset.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/6b4240a38447150a55a89a9598e4a9da/14448208425.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/wuroguvut.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bc6f070bd---jisimagi.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcab8b08673---68225777450.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/kazerojedixipirozosaxuw.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b0bd9116e---wesofuloji.pdfIn PDF document text
    • http://regmac.net/userfiles/files/49717320993.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dd223ac21---pidevaped.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/h00fe3d14b3qfl3n4ccgqi23l9/ximevafewilovolofojimej.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/8af532b5cf43e8dd566ce46df561a5e8/lifuzodax.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/e74a28471b9067abff9eb5120620aae3/vakemagepor.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d953a2922a---buzogawijojokuvaxaxetak.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/wosume.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_off0000f312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF312 18380 bytes
SHA-256: 397bde12748852731fd0f4adedc37bbf0b3e45d94df4bdfeadf06136ff64f9c6
font_01_sfnt_off0001228a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA1 11016 bytes
SHA-256: f156330e566b77254d43634f87282dd191e728c93425566d97230872a28a6ad6

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