Malicious PDF — malware analysis report

Static analysis result for SHA-256 c082d495599758ce…

MALICIOUS

PDF

85.0 KB Created: 2021-06-28 07:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9483a9fe0d9bd3320593b79cf526e101 SHA-1: 5af61e1fa681163796b7e36e47d924636b39b049 SHA-256: c082d495599758ce41296b9303172059b1f1af1b131a30f49c2cafbd1ed9aaae
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier strongly indicated maliciousness, and the link farm structure suggests an attempt to distribute traffic to potentially malicious or compromised destinations. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 5

  • 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://mywayrtk.info/userfiles/file/97445875892.pdf In PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160809aec82b2b---60874473147.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/13465169136.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/18625286951.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818e0b143ed---wofinejorufubi.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6264a9e3d---pawek.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/iat3dack38crqm3je71f1v95fi/rekewuvonoxo.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/tu69dgmuo14hp5te2ha1rdhj0i/84117635182.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/54041115133.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/pdn4pipcbjd310et0nnidcl2fc/505117781.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/55696246139.pdfIn PDF document text
    • http://deltools.com/userfiles/file/28589861262.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2d701ecb6---74058911659.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/76d297ac66bc3d1a1a38c339fe283aeb/30962443061.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/joriworoxuwiwega.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/lebuvedajafozoliserula.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720de31c9d7---jevaretumemidodidupad.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60b1e3aaa9f31.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/aaeb70699d0da18b9efde5f076ef5243/lusupofuzezoberafime.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4587ad0fc3---64422086308.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/57040768705.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4976ecfa08---vobapinisonugana.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/wizotabugazaseriwazed.pdfIn PDF document text
    • http://njf724.com/basefile/janatalnajafcom/files/73916293188.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=who+answers+the+three+economic+questions+in+a+market+economyPDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD392 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
font_01_sfnt_off0000e973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE973 10980 bytes
SHA-256: eade4f9e2e08469f4ff435dde23f45e388d8070607a53cc81a728d6203ff1681
font_02_sfnt_off000102e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF6 16600 bytes
SHA-256: a3fc04a0202866f400cd100b1596300d12f22568540351f6e6cdf60f5cd2cff1

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