Malicious PDF — malware analysis report

Static analysis result for SHA-256 398cb2ed427e8833…

MALICIOUS

PDF

179.9 KB Created: 2021-07-18 09:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 859c8c656f1e712fdd622ed5b9591fe5 SHA-1: e87255fba9fbb8966450ea0093739050991b193b SHA-256: 398cb2ed427e8833251cb39a99c0a5a224c3ac579103728d1b694244f812b3c8
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link T1059.001 PowerShell

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains lures for lottery winnings or parcel delivery, combined with instructions to copy/paste content into command-line interfaces, suggesting an attempt to trick users into executing malicious commands. The document also hosts numerous links to potentially compromised WordPress upload directories, likely serving as a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d79f65024d0---ludefat.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/45b15006cc0dda53d2ecae56bc8d1160/90371731232.pdf
    • https://brianhigbielaw.com/UserFiles/file/4153166435.pdf
    • http://alimentosldm.com/userfiles/file/34432071495.pdf
    • http://eros-arena.de/eros/userfiles/file/91466653611.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092eb6723af0---budiritof.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/638234c41b432a84e929a9966c6ea731/nevepolazipiroxevifurew.pdf
    • http://skpizzasubs.com/uploads/files/kamaxifap.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05111d2425---46569778498.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddfe39e901---9221208197.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070874e67a73---jemogasinaxavosiwawu.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0fc6902e9---sijazavofi.pdf
    • http://designklasse.de/ckfinder/userfiles/files/bijoponupokub.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18c27e0361---26445052424.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/8b51257cab951a289a9651cd2662c35b/dusabomajaxekolirapugikeb.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c255c37501c---peneku.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/vu5cvbog2qo9u95kf706jt9q69/gusujidomesarej.pdf
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/7dbcb6427b30d3f8fa41cb1035b5b3bb/59421676912.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f047ca4aae2---liwol.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b580674a8d1---sopawapora.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/d193c485895f5835a7907a547a8049f1/83788991483.pdf
    • https://businessservicesuk.com/userfiles/file/dizoferetolinaxet.pdf
    • http://zpb-maciejewski.pl/upload/fck/file/89283619186.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=wpd+to+word
    • 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_off000261e1.bin
d6af70e62b1b48e8ab80e7d89b07f51eae68fe567edf2cc8fea0288e015593cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x261E1 9760 bytes
font_01_sfnt_off0002774b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2774B 16792 bytes
font_02_sfnt_off00028f5d.bin
08e2b8e213bc3f948fa1fa09d888e24b0d0079d2b2272b09d7b388bcb5a7c5bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28F5D 19072 bytes

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