Malicious PDF — malware analysis report

Static analysis result for SHA-256 5801414205c02400…

MALICIOUS

PDF

134.1 KB Created: 2021-07-26 08:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62a7acc9f9474cec4ac3801177f82e85 SHA-1: ed2cdce7a2184f9c58252503bca8e1ee851e6beb SHA-256: 5801414205c0240063841fba035e3983c5541df3ded47c0701f327353b178bbc
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam. The file's structure and URL patterns suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9842

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://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/ipgoq6up68cbu17qp4rq3j4ahc/xovuxobuwusateta.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/2m72gtj3p0s61ob8m0qr6di7tm/tebivuritiduxalubenasun.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607715c25eaa0---kexoniwewufebokutuf.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2d5d56444f---42274230307.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/a8ctvkbepiq6h8k3vbkdurj61t/wibukudivulaxasedugexobi.pdf
    • http://pinturasoltra.com/images/slider/files/vobalifeketekexov.pdf
    • https://path.mn/userfiles/files/18198788223.pdf
    • https://fiberglasssupplydepot.com/userfiles/file/rubebefovidavaromabuzaguv.pdf
    • http://stjconsulting.it/userfiles/files/riredeparorikemamopidota.pdf
    • http://jkbprivateiti.com/userfiles/file/nufedinisijudetazolusogaw.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab804ea5a7---49861739647.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094b9507bf92---tunupotolafagabojekopudu.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7e885638d---87640882529.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608caa3870543---rovinuzes.pdf
    • http://dienmaybaongoc.com/ckfinder/userfiles/files/betuza.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/ba95e820439b8402750fc4c0e1939e2c/vowamakix.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160ac66290e875---bikubagativiluwozu.pdf
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764e94cb78a---41776105638.pdf
    • http://generale-bureautique.fr/gdb/files/file/fetevamulikasi.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcbbd8216f---87462908360.pdf
    • http://atallmed.com/userfiles/files/buxibixobofitutowijunomu.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/kunuvi.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/14i2rlimqd7nee7m1mn5ukc0u0/fogevaza.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/8b6b8aa8b06af96f546bbb59961facc7/xegikotizolavokerixixusel.pdf
    • http://imhyuk.com/imhyukeditor/userfile/file/zovojunujadafasawur.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=overeaters+anonymous+food+plan+tips+and+tricks
    • 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_off0001a93b.bin
04471a93766eb8e3227a0069360318cdecdc8fea4d63f8fc886f2d118ff055b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A93B 17348 bytes
font_01_sfnt_off0001d702.bin
6724a12c1dba56a8c6e4f4caee4078ba9a3b472c8e7b9985f5219e4aea77994e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D702 11176 bytes
font_02_sfnt_off0001f13b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F13B 16792 bytes

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