Malicious PDF — malware analysis report

Static analysis result for SHA-256 d217c994ec1e3a51…

MALICIOUS

PDF

89.3 KB Created: 2021-06-28 00:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d05031543ca4bdb0c9101cf47c821b43 SHA-1: 3874639f409ce0eb5df3c8f1c007133237b7ed9d SHA-256: d217c994ec1e3a51ecfe9bb54c4ee3d9b63b128ca85dd8e6e7096b501c7e7341
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous embedded URLs pointing to compromised CMS upload directories and the 'SE_CALLBACK_LURE' heuristic indicate a phishing attempt designed to trick the user into calling a fraudulent support number. While no scripts were explicitly extracted, the overall structure and heuristic firings strongly suggest a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d557da7547---fideleputuvomexigubapigur.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3655e3caf---62767426708.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/6cd79ee85f95c0f48225602d206a848a/33820029592.pdf
    • https://tlproduct.com/userfiles/file/78981054919.pdf
    • https://nsck-cykelmotion.dk/userfiles/file/8157467462.pdf
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0c4441fa0---63388544467.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/f15b260e87ef34fe6871b3771b5af7e8/defod.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607f25e077ea0---22715677795.pdf
    • http://agiusfuneraldirectors.com/files/file/tumoso.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/80466c0903d43e5c9e8cb1fd80de7ac6/luvotiniwi.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e8f8d1d00---basefurexakamata.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/qmf4tmsfr3hcg7k227fas6uo8q/pifazekopagixuj.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160814352ba914---depuwixiboke.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/7iq7rmen1gnbki95hvnnco6if3/nuxezar.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/6f91fb0ca4020c4ed5a26326f9480264/95929787861.pdf
    • http://jun-travel.com/userfiles/file/beremorumi.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/sldjfirvaq9j9co8edvu00ufh6/xezubemakeniwezezapekufu.pdf
    • http://unseretochter.ch/images/file/32563232893.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/c850cbf70465742691a37b6736cfecfd/31199452725.pdf
    • http://3lbordercollies.com/clients/a/a5/a537dd6ebb785c9f51a9b4acbfea693c/File/pibufidukokeso.pdf
    • http://caramelitos.sk/files/1856360454.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/994c20ef6410088af9dd22bd679297ae/40004577186.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c73e6f0064---68942143273.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/79191054502.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc293300fe---57597483748.pdf
    • http://pamat.ro/UserFiles/file/7790695213.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=21+indian+act
    • 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_off0000fcb2.bin
6c1bf422ec19c32231ae532acae0cbf00dc456389dc9ef2b40803855eb3ce9d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB2 9872 bytes
font_01_sfnt_off00011293.bin
29765bd4e52a596be332fa6928a9ba66a683a8d1876133bea0f6031db831ec30
pdf-font-stream PDF embedded font (sfnt) at offset 0x11293 17476 bytes
font_02_sfnt_off0001403e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1403E 16792 bytes