Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c17092aa14e4db…

MALICIOUS

PDF

85.9 KB Created: 2021-06-28 05:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0fab24fc23f4ecf98bce9760ded3c789 SHA-1: d7a8deed0ba12b909d399c0f7604a6a0790c82b7 SHA-256: 78c17092aa14e4db9e4544286e4a1c09ff345450d0cd99f0a8e4d3e88f30291e
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 a machine learning classifier as malicious. It contains numerous links pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely serving as a lure for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088165c213b4---waxon.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/c7f5b98d717dbcc92c9b3e4d5603a37a/39458034262.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d89afc7920c---20894825933.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/25fa9937eccaa2bc957ed8a0f96b40e1/65286641696.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afc5f17db52---63813245384.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a30b5b6161---mubuzupetupalutu.pdf
    • http://drivingschool-brno.eu/files/regibopegitowa.pdf
    • http://zaun-produzent.de/userfiles/file/begawewiwaloli.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65b82ba421---1350612634.pdf
    • http://ahchala.com/img/file/tirorikumerezalokobom.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe7a387f11---relam.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae75e4a849c---nusekuberexuveriwove.pdf
    • https://5uempat.com/contents//files/muwovokexaravukem.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/og15ot7b61fji72uujfsuuc007/92357205432.pdf
    • http://lapenya.cat/imgjovesnaves/file/tenubovuvejege.pdf
    • https://seeandhearbetter.ie/img/shop//contents/golupigarexojujin.pdf
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/16940584217.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b425d753af5---vizoresewonu.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/lefebitobetafeduxibole.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/daedd1cbaba9c4788ddab3608c421e6c/66824104410.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/pv8i40u0sv95gh99843u9jtv56/gejasasawizirum.pdf
    • http://diysmart.net/userfiles/file/83911139139.pdf
    • http://verkaufs-akademie.com/userfiles/file/53625680100.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071493875c34---bulefebabazudu.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/5c90162d0f76e19674c5fda9e4588413/jixidagapexefatesufovovo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=changing+a+colostomy+bag
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edcb.bin
bc13d82672c6cd0b33364414c0445dd6e8fe7f239ef65b54f2ddbfcbda449c62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 17060 bytes
font_01_sfnt_off000119f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119F4 16792 bytes
font_02_sfnt_off0001320b.bin
14da50eba8410cfa8d71450d6e494bb0ba56323b520f8e929cf8a9869b3a85d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1320B 10732 bytes

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