Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3cee09de9e197e8…

MALICIOUS

PDF

90.5 KB Created: 2021-06-29 01:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 76779392ba0d3f8a4878e291dfb3f6b8 SHA-1: e5e476ac12ea6cb22a05eadda1ac079e3f699982 SHA-256: d3cee09de9e197e842bace3eeaba139d9022912ca21c52ede9fe659505b187fb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous links pointing to compromised WordPress sites and disposable hosting suggests a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the overall structure and URL patterns are consistent with phishing or malware distribution campaigns.

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 http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16087e7ef84676---miniz.pdf
    • http://dietaltop.com/userfiles/files/79340816742.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c134bc81fc8---87444314054.pdf
    • http://446888.top/userfiles/file/jukuwukilizav.pdf
    • http://alarcon-v.com/editor_upload_image/file/5976395938.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9114893a77---76395702121.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/oujpllir456i9jtrf9j3rhb01t/bopab.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac01975149e---96328648682.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/0nk25j9hnukbj7ba3g2crrmof2/zediwariwesitexekok.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/3a4e1e2105650d0f24a9079ec2ecab3d/binubokovusuwewu.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/349048414d2f2ac0e387fea40d22d8b3/pixativixoviwumapokiwaziz.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce24309c8a---xalogakifaxisilufi.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093802296a1f---tovisizunololi.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/90453f9d283f2ea11b01557fb3cc9438/49487640044.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/ec2b4a68d54a7a507d987fa0781946c2/53640938538.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/b47cc3a21bcd1c727ac3baf86560bb6d/jebojezenizi.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/r549104rdrh0s4bvlhptavha7f/17886960259.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/1420abfd57c4f7be73e1b1f6065ea3d7/nunepabivabikexutuwulofi.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/2ae99023d0ff533f1f8b5239c6701512/deroledukor.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/db2bf1840aa7cbb08fe354714a1e55ef/7289967372.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d83bebdcb6---48397441143.pdf
    • http://m2m2design.com/userfiles/vipewewi.pdf
    • http://maytinhtuyenquang.com/home/maytinhtuy/domains/maytinhtuyenquang.com/public_html/images/file/vimovaraxalufugusesularo.pdf
    • http://51www.org/uploadfile/file/03bb5d1567db96df44b43313c18c9b56.pdf
    • http://liburnia.pl/userfiles/file/toluxisuvixu.pdf
    • http://chouchoudauphongongtay.com/upload/ck/files/21966619738.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=adjectives+to+describe+sight
    • 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_off0000fbb6.bin
e6e310409644ceb27076d89943ce4a3236239bb6fa32fd8e66ad43a28b3a6d45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB6 18872 bytes
font_01_sfnt_off00012cae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAE 16792 bytes
font_02_sfnt_off000144c5.bin
38f8e333a65b5e9f46042818c9e85d9ff2c1378cb1d4b7d16433568df486ad4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144C5 10656 bytes

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