Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a9ea18e3835b0a…

MALICIOUS

PDF

98.5 KB Created: 2021-07-09 23:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7a5043c71ef42690080598b2281b81a2 SHA-1: a4ce8db954c72a20cff51511d676ae0a34583702 SHA-256: 32a9ea18e3835b0ac0090df0043fc43d7aabf99059599a61ccc04f9047a9e16f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7c981c6238---31259275852.pdf In PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/bvlslb0hfmh57o5uacjo93igoq/39076846407.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/83579118784.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a826fecf394---repekelusokinifozavowo.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/bjvuhsvkf6038jf708smr17jg1/kusowifoxono.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/wejosajowazulexarumegu.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a57ff50e200---29473799575.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094fddcb1821---vuzisojeromanozixup.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160753b555d901---34144818862.pdfIn PDF document text
    • http://ih-consultant.com/ckfinder/userfiles/files/migotalofusosudajojojire.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16079018d14494---54813122428.pdfIn PDF document text
    • http://apcmagon.com/userfiles/pogod.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719996d820f---paxubunesivimisilo.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/859f92087f611d30847a5c46ca1fec08/nurixejo.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/4ee587d7b97ddd7b0e8ee507949133fd/fijomagatodigoxi.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/f6a9ce5c834308f422f62ee10b74d132/vuxakomokidepefibagupasut.pdfIn PDF document text
    • http://yfatc.com/userfiles/file/naxokemovokepamevifawidum.pdfIn PDF document text
    • http://microlana.com/ckfinder/userfiles/files/botiwujiderarosodun.pdfIn PDF document text
    • https://fishboat.hr/files/dunumutuxegopuz.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3390764e4---77439558330.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8a392b66---kesuxoluxebusaxezevipaxu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b57b5e3180e---faxofulegodunugapu.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607987e28ea93---46446164352.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/gekezijebevim.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/65020794277.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=questions+on+the+road+not+taken+by+robert+frostPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E18 10912 bytes
SHA-256: 032d2d4d6d38085dac953ee1865bb8e0f05adf559db47f4561ee3e2e5db71fc7
font_01_sfnt_off00013773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13773 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F85 17136 bytes
SHA-256: 6400cbcb346616c9eecb8b1bd2f3c6f60ffaee00a8234715adf67d3acc430403