Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2d9893f3610000…

MALICIOUS

PDF

92.9 KB Created: 2021-06-30 21:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f62500d3f7f16fb164b439c30d6b6d2 SHA-1: a5a97dcb85c6402ace6da21b18a4c558f337185c SHA-256: cf2d9893f361000057395d77a52924faf6a40af22d32d72b13710ea3070b70ff
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier. Heuristics indicate it's a link farm pointing to compromised WordPress sites, hosting other PDF files. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam context, aiming to trick users into interacting with malicious links. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious content.

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://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/id0ro15407d31oggbkj5eu1qr2/97884794756.pdf
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/31474836136.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b868e82128a---17912543600.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/91bf16829dcd227e4ecceca27e666dc5/vatilakewetama.pdf
    • https://gastriklandsbf.se/UserFiles/files/47579436884.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/0df0ff1127f37ff265aab2a4bd1b4b7c/44308202043.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a4790cec339---tupefemeravodulutetutoko.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5b88dd44f---94744769361.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd68285c6e4---wupugunejarexerovofok.pdf
    • https://seitonsolutions.com/ci/files/kutukatotusaxo.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/e51dd78f50d00f03c6500be7a605514c/fiziba.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/2228560c76cec25a6ebaf684997c158e/79300924272.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c04fe6ae3a4---12738116100.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24c7e410b3---70890862755.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9f36c123e---tanukobenujeka.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b572c11ee81---vesafazogililesugu.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b1304933333---pokowuguzewivebilevoj.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608894c9eaf4d---32627218217.pdf
    • https://damiel.eu/userfiles/file/70554489327.pdf
    • http://kursadowicz.pl/Upload/file/bulatorobo.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f45d2b05c9---22874523088.pdf
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/10771615589.pdf
    • http://tokstar.com/_UploadFile/Images/file/pusamekanaxifurixisadifo.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/62182626798.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a81f86d19b9---20918599802.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16076a2f2c8cb3---lapujoxalugovipozejatawan.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+cancel+payment+for+icloud+storage
    • 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_off000104d0.bin
0f3938ee4fd712a8c11a4e8e2a82145e1396ef755a79314dc72e79e244e8b787		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104D0 17744 bytes
font_01_sfnt_off00013399.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13399 16792 bytes
font_02_sfnt_off00014bb0.bin
18b21f916f4e1cd20ebb20bb1c722b07eb8a75867ad3d4b44bc042401bcff0bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BB0 11252 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.