Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d05a6610cd44c59…

MALICIOUS

PDF

91.6 KB Created: 2021-07-13 21:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3938f6bd7bc7c0b8baf2f6c14356597a SHA-1: a446999c78eeaa503172763692fe1a085503a739 SHA-256: 6d05a6610cd44c596c0ee3c9106d1e88e82d9728f43a10d025a257e05522cf06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to compromised WordPress sites and disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links. No scripts were extracted, but the structure and URL analysis point to a link farm designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 http://deeringbayrealestate.com/userfiles/files/lakisepibitezopajisu.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867bdd0ef28---belazinatisowojorovob.pdf
    • http://alibabashipping.com/userfiles/file/lunotoketenapuvixesowareb.pdf
    • http://voijin.com/userfiles/files/rovidifozudaj.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/1abfe3a7f6169d980c489a900611e048/62195445816.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/6c610d382d68a2c563fe5ea6757ba00d/gijigudedoroteduvag.pdf
    • http://reversetheclocknow.com/ckfinder/userfiles/files/vepobavuvupovon.pdf
    • http://heritagecarletonplace.com/clients/c/c2/c23aa4fb54f25340752d20cfcff880b2/File/20087533727.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d64b270992---11868526321.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/a972d84ed4969565f2fd116e77682b5d/43044210871.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/a42cccfc0a4d021788654106818c6aba/72940967238.pdf
    • https://bahamianbrewery.com/ckfinder/userfiles/files/78080379749.pdf
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/41572817870.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/e3970aea20d66b14cf5080260bec6e98/18244481645.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe7507be5a---tuduvakivipopobo.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/eb9599bcb7f66aee515877211d30bfbd/5003100065.pdf
    • http://deurenhanger.nl/userfiles/file/36040633039.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/tkechov6rmtb7cm7e1nfrr885d/fubowuvinetowes.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/6112d9b99ac207959dcd76d4831a4622/35733530058.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/g53cb05190cr39mjnhvbhl5hg6/pogoluxoraluliga.pdf
    • http://chothuexehochiminh.com/userfiles/file/31914674079.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aad45e48429---89259035805.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160731b8ab8773---32515534357.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/581610aff3725d685af0847743de7346/dojorikajovir.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608123e536097---41585903382.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2cd20b3ec---rodatize.pdf
    • http://fecoil.com/userfiles/file/9975881392.pdf
    • https://subarini.ro/mm/file/46509693498.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=across+the+room+meaning
    • 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_off00010253.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10253 16792 bytes
font_01_sfnt_off00011a65.bin
bd279091cf88e00c03e79093654708e9208e61982fbfac99ac5308937ebf33f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A65 17668 bytes
font_02_sfnt_off0001487f.bin
aa12cf5f15e834ff264680ebc85f79e3df2179ac535532c4bdfb3d471a5d61b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1487F 10612 bytes

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