Malicious PDF — malware analysis report

Static analysis result for SHA-256 692c996031f7365b…

MALICIOUS

PDF

83.5 KB Created: 2021-06-26 04:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 21d51d849d5002741cc39d2dff0d99e9 SHA-1: 0079dc1d5db419163f49b5df7139ff9b8cb18b18 SHA-256: 692c996031f7365b003991bc4a67b0ed63b1170c141e9e96d83fac79bd9128fc
176 Risk Score

Malware Insights

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

This PDF file contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content. The presence of a callback lure suggests a phishing or tech-support scam attempt. ClamAV detection and ML classification confirm its malicious nature, likely serving as a downloader or redirector for further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9783

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://iaestedresden.de/userfiles/file/24498505386.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/f1d1a0ed44529d55a4cc7a2d6aa9bc82/devovet.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d65c4e4a06f---bupetofetovobesaja.pdf
    • https://propactionvehiclesuk.tv/userfiles/files/luperurimoxuvetel.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/2431af68792f05708af404f68e3060d2/51085680817.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/acmk020eehrog4nfupcla9vn98/15971184130.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986fc46ea14---41977450586.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/e44de6539266a84913baf046fb9a941a/gexakuto.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbdd97bbeb---wosarukupetidifigiwo.pdf
    • https://aldurra.ly/images-editeur/img/file/21461334806.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/dm8cndk51gjn8uml2pvflgpqoc/begizibusiguwumatevelexar.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/uupeklf43hiih1djh5p36invc6/66416608721.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a25dafbe8ca---73945706314.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8161990d2---71373013595.pdf
    • https://egyiksem.hu/uploads/file/80418039000.pdf
    • http://rotarylaspalmas.org/documentos/file/rebakola.pdf
    • http://learningkey.org/userfiles/88700153495.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/sug9go8ubqn68a62i1srktvn40/mafawijikuwokoxowaso.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38d3e357da---50534059064.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc98518c5b---37907601053.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/q98t6ntkj685c1cks8cifhogh3/1178210918.pdf
    • https://www.foundationofhope.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cacae114b8---jazaxefetakusolomumejo.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2bd742868---kamalununetololorojig.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160866594818f0---xiriredawafinonokamulana.pdf
    • http://zabradli-znerezu.cz/userfiles/file/93286515216.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d48d4d543---78863660505.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=indian+polity+by+laxmikant+in+bengali+pdf+download
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9ca.bin
273462d0fe35b42ad7dc8444e4a20560f3d04d528f325eedc22eadd4a71f1045		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CA 11060 bytes
font_01_sfnt_off0000e321.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE321 16792 bytes
font_02_sfnt_off0000fb33.bin
c9a9595144517ea1eec13b92c787e7921022670be3d5aa76c779de71805c8699		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB33 17116 bytes
font_03_sfnt_off00012853.bin
637a9dac0afc585f1f105c2de408df99420c2eea19216aca5c902ef31b2be0e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12853 16172 bytes

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