Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75eec6c4e415380…

MALICIOUS

PDF

84.8 KB Created: 2021-06-30 22:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d954c68c5d225dd7d4176f3203787c90 SHA-1: 6aa93cc7608bcb2ad712d84367715d72cde3e2d7 SHA-256: b75eec6c4e41538063000e6a86274eba9238ec98dde1256b4eca011fa519297f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The document's structure suggests it is a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting, likely intended to redirect users to malicious content or phishing pages. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to prompt the user to call a phone number, a common tactic in tech support scams and phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://aiswaryamatrimonials.com/fck_uploads/file/30228716786.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/573137d6da9833cc83d4c670413ea0dc/kebedabulufe.pdf
    • http://antoniolescio.net/userfiles/files/boloduv.pdf
    • https://sjalikave.hu/pictures/file/17252808431.pdf
    • http://skolicka.eu/foto/images/file/46887387884.pdf
    • http://vtvxm.vn/userfiles/file/69474291554.pdf
    • http://adaviestransportltd.com/userfiles/file/zorisivikipisilup.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3def615a2f---ruvejejidovapi.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080033cc7ca4---laxeg.pdf
    • http://geologicatoscana.eu/userfiles/files/dapol.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/adfb0d14a12e791a380ec1480825ba84/vedakupekufonuziwipebis.pdf
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/73fef0a7d4363de60dd05eead8af42c8/40987739554.pdf
    • http://avanti-kuhni.ru/upload/files/mopotivesa.pdf
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/kiputozodeje.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/a6607edf5d551d4f2d9660bc0531f6d8/ratumixanobikezi.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a258d1b42c6---vimojozoxenoxujatawumovi.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/abee0b923d541caf152c291bb1834577/11761317918.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/nf7445ud3iv5iicvik9ggag10j/12096669778.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c9498915b---relinejirafat.pdf
    • http://workcoop.org/fckeditor/userimages/file/20210605222126.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607654a43a1e2---95269684539.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/f41f39631ff0132bf1cbde841e40a288/99921449493.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078d1b69cc33---gugalijuk.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+old+is+grayson+dolan
    • 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_off0000e76c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE76C 16792 bytes
font_01_sfnt_off0000ff83.bin
bee598ab6f0e46c000c54caacb3d5941a22f72dc39c6852d7a171fb6b2aeabea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 10384 bytes
font_02_sfnt_off000116cf.bin
faa650a3df9a19fd0d7cab7f34eb450a399577fe68875c1f1d2bbd4dd3966c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116CF 17976 bytes

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