Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dde953d198ce53a…

MALICIOUS

PDF

90.4 KB Created: 2021-06-26 00:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe0a848ef097c1b05cae7379d0c0231e SHA-1: 9405fd5b02c1d113569939917b4348d04f193633 SHA-256: 9dde953d198ce53a1a6362375d37107a2dcc96f7dbcc60169433a88b0f407e2d
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to distribute further malicious content or phishing pages. The presence of a 'download button' lure further supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inwebjor.ru/uplcv?utm_term=fifa+20+mod+android+offline
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094984b671a8---kinodogiwekezowofowapiji.pdf
    • https://europartner2.pl/uploads/dezovedodefi.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085dd7ce43de---kasogelifugezufaxafa.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/824a43f58efce93f62b905d17a307a87/32869734286.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160b773b22931f---26692027757.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7694644d5---vetebat.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16095362fc75aa---zifaguzifir.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b15c399adb0---foror.pdf
    • https://an-professional.ru/img/files/file/sozilodenexidurexodabodi.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/301cd27edc544b9f08ae7169c37c5de2/lidejiwulosewifarifode.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2827ef10b---zulelozoxokumugupil.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073736e23395---jagapupijaxarivumivutaz.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/b6e631a7811b3eb35c5a60cd9fa4e6ce/gubutesonifadawava.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608866197d624---xokup.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813c1e5755f---44273515100.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/vt2rfntr9nruif0l13ca0td7u1/55485734702.pdf
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/44927032254.pdf
    • http://myshopekerala.com/userfiles/file/rizuvu.pdf
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/ralonogovapa.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2203c79cf---nojovigebe.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086274ebb7de---48053875525.pdf
    • http://andlupa.com/userfiles/file/52270161893.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7776100b92---96425032364.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/0ce7fffe8e763e372a580f9a27994835/67076303155.pdf
    • 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_off0000eece.bin
52cafe5b615587dffcafae65d7ffbf46bd91f8e766e5e41ad4c2a41203e54549		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEECE 29100 bytes
font_01_sfnt_off00012b10.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B10 16792 bytes
font_02_sfnt_off00014327.bin
f0e9234b877a806f70cc89639e0e126116a60c588b0f84df8e6a5501b13ac04c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14327 10468 bytes

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