Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b869e0b381ea52…

MALICIOUS

PDF

89.0 KB Created: 2021-06-30 02:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60de629c210f93ee93ab8ae511b71104 SHA-1: dae3431745b2a2bd24df763398613b0dd028d971 SHA-256: 02b869e0b381ea5200b4182ade57d10bd165ef6b1c0434df52b638068e8f1bbd
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites utilizing the formcraft plugin for file uploads. This suggests the PDF is designed to lure users into clicking these links, potentially leading to further malicious content or exploits. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608800a7d9187---migivover.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16089c1ed066fd---28916606892.pdf
    • http://pphjako.pl/userfiles/file/24304182724.pdf
    • https://clubslotalmatriche.com/calcas/file/92684804756.pdf
    • http://hasyo.net/files/file/42722226747.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/89a3205a32bd23a3b06b6d267fc3cec5/dubuzusokumamig.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4af0ba3a62---72472333670.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd696bbce20---wolafixobujegopaxakuli.pdf
    • http://geoplan.su/userfiles/file/87451493054.pdf
    • http://radio-salsa.com/php/rs/filesupload/file/pajedavogifofovividojir.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b38ab543a59---novonimasoziwuwubidixi.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072df1e2409b---kolebanowowupufuwakumo.pdf
    • http://opuspoint.com/ckfinder/userfiles/files/jalatedilojuzetisiwesuxak.pdf
    • https://bikeid.net/ckfinder/userfiles/files/nusajivubekifiponigina.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160807d9f692ef---97888912264.pdf
    • http://churchtextile.com/userfiles/file/fawadifajusonised.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/f9a51dc758293be6ffd902132c84c63d/zidusa.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/brihcm9vfjhaufrgiej6mu82qd/kubekobovapipefomepipi.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb44e70d90---47464698947.pdf
    • http://zamokugrofa.sk/admin/fckeditor/file/bufewojomat.pdf
    • https://srinivasagroup.com/ci/userfiles/files/41268318451.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d939c9e9825---gaxiwotabilolesowolunixim.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0a95bd443588bdf92d9492154380c2a6/bukuli.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b097ebeb10---55183346642.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/7926eadff2387dc44edf6e41b3968d13/sujelamogaf.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/jojfe4f945pf6tsg200p1vo4rc/43499915329.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=in+which+year+the+adrian+cadbury+committee+on+corporate+governance+was+appointed
    • 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_off0000f832.bin
312bbaaebae82f18d4f1718d7ee27c1d0443f0323ad98a9d6eae4e92064ae604
pdf-font-stream PDF embedded font (sfnt) at offset 0xF832 16636 bytes
font_01_sfnt_off0001237d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1237D 16792 bytes
font_02_sfnt_off00013b94.bin
d8943ffaac9ea223ffe73ce6f39a3257f36dbb0d471f765d034ef576ec320607
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B94 11372 bytes