Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d2ffcbae5d4b97…

MALICIOUS

PDF

82.2 KB Created: 2021-07-16 08:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c321b6b384a047b37403bfb3ae483aa9 SHA-1: ac4864349f4079875eae7b223c872a44c7bb9e4b SHA-256: 62d2ffcbae5d4b975f9243b7095d33a88d10f78d5835bd382eac33603b462993
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • 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://goodtraefarm.com/ckupload/files/xiwidativaxikelasamovem.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b78327a2732---timelajigivofuputosi.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16072720a18ef8---sulugesojitat.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f1a00051e---zoxijamonudawatiniga.pdf
    • http://gmicropilotes.com/uploads/files/govanor.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/clldivs7tn9huni0dfdokb3d92/bomesazav.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/tsnifkjq59l2k8mqe5vub3jfki/70364033540.pdf
    • https://grup-insaat.com/userfiles/file/62376021311.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/29f39599344830aaca4e80cfebccbcc8/49390442002.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bfde6985f---27758550028.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c562d5e9956ccadab3133531d5bd8879/39991413785.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/34341f17af9387e9fadc9579f80c9d03/97118266748.pdf
    • https://wietsevoermans.nl/ckfinder/userfiles/files/12806440501.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f40239f48---dalifetubalexata.pdf
    • http://www.anjhimayath.com/upload/file/75690481221.pdf
    • https://argentinaproduct.com/ckfinder/userfiles/files/21035505860.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3802067a9---dogomorixakif.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b21e273f74---83672733035.pdf
    • http://permanentnimakeup-brno.cz/userfiles/files/70263385245.pdf
    • http://studiocalcinoni.com/userfiles/files/92785427135.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071a9678e937---31423230346.pdf
    • https://monyetjoget.com/contents//files/nixixawakowowuwuziluva.pdf
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/9cdde911d36fa165d0fd549aa38d85ac/8294823926.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=artemis+fowl+and+the+opal+deception+pdf
    • 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_off0000dbc0.bin
d220394e1a3dc3be3375c7b3cb602d442c43afd8ad7e62041711504123aeebed
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC0 17968 bytes
font_01_sfnt_off000109fe.bin
53f84a0176a7ad3ec5d2908ab842115b1d49339b817ab19306bd529c686c3e24
pdf-font-stream PDF embedded font (sfnt) at offset 0x109FE 10952 bytes
font_02_sfnt_off0001234a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1234A 16792 bytes