Malicious PDF — malware analysis report

Static analysis result for SHA-256 f120ea5fb891449c…

MALICIOUS

PDF

83.2 KB Created: 2021-07-16 01:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1f0eb38009e803a0f2200c542511709d SHA-1: 114e237b6b0c3b0cbb44c5f6c1a00cf412928a98 SHA-256: f120ea5fb891449c9576d94229ab383a3ee91b8ae25541722efb0e41a39ac518
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload is intended. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084a22302882---83562245273.pdf In PDF document text
    • http://aqbnb.com/uploadfile/file/77109077764.pdfIn PDF document text
    • https://invest.pl/userfiles/file/fufisumajepe.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/c7e0ab8877d443388f884f6771bd4366/bakemofeluli.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160cdb5cb3cf07---6543711578.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/9ebdf25ba8f4a0cbeedab68739ea44a6/76018133945.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/b6de7616df30a5f79255412baee619fe/laxis.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608a49f5ce5f1---niboxuzefagoguku.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/59153541890.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4395ce8bfd---fukurubivolekusuguvagef.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/fb771d20c73fcc5a23cffa60bd0845c0/matoduwelanivetuzadigavuz.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/9bc9ba302e7dca8a3b2d06cc5eb91e50/xipikitezemifoniraju.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079dec3601cf---nukewozufivo.pdfIn PDF document text
    • https://iiml-pgpsm.in/ckfinder/uploads/userfiles/files/40377161779.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/gifakopiv.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/07235b35aace8ec4af160425a8049fd0/81243426030.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210603_025230.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/b14c5d8c2ee7832ae38e4f190e1b3d94/nunibiwepizosikoga.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff79ee746f---12193306435.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/laniditowaxuja.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/23559364814.pdfIn PDF document text
    • http://change4best.ru/upload/file/76228795167.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/23028088874.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=is+copper+a+mixture+or+pure+substancePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE300 16772 bytes
SHA-256: 10bd71ce24e80815940001340dfe7faf64ab27989ced5e73711a6c1e44a1e862
font_01_sfnt_off00010ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDE 10780 bytes
SHA-256: 253dc5abbaa5e6ab517fdeecfd6d5f073fcbac41e9bf816832b8eef3ef8c77e3
font_02_sfnt_off00012782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12782 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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