Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbecddea95c8095e…

MALICIOUS

PDF

85.4 KB Created: 2021-06-26 07:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7215d749fcec82097ce80e4d20a34490 SHA-1: 3f9ffe127c71362f7cc760815c36de33def29f73 SHA-256: bbecddea95c8095ee2033f233d176e6c60e60d122792f958a1e123437c84fee4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and the presence of external URIs strongly indicate it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://archism.ru/uplcv?utm_term=world+record+lahontan+cutthroat+trout
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/41ec6fd217f6b9a4528078617f0a5183/74830059594.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/af601f4c3296b425f5de1d6ac897adaa/lovamufabujo.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160756c4f38176---34743140577.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32a959c26---70387702685.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/2en89qhg7jlkap1ed1lcttad6u/87306243753.pdf
    • http://lezeckastenakosice.sk/upload/files/janezadaxetuli.pdf
    • https://palcev.ru/userfiles/file/74017760400.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160793b43984da---44620981963.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/f6ee482bac9832c29adc78800a28197e/92670418527.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb18061798a---73727198502.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087c21472f57---wizimifejajulikatiwuridul.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb6bd19531---vojifulaxugini.pdf
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lawopetasitek.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/n9om7ksnm5teel04l843g7eo52/bujajarip.pdf
    • http://tlxzkj.com/uploads/file/170348129271.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/22ee5e968a03de112590525fa8fa60ef/85880223155.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b3471a686bb---56235286940.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/e669a7ddd9af22863abd5a77336c56d6/gamedonures.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16091e9ffe97e3---xerurilu.pdf
    • http://sunarfactory.com/userfiles/files/15001980772.pdf
    • http://aapltd.net/userfiles/file/63579237257.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/de08097f677bb4611d0004a33e7d8446/99237458592.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160773264dd75f---milabepefupodimotemab.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/985c0d1752e50c5cce293fca042e3c72/mafazabasofafujukijov.pdf
    • 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_off0000ede8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE8 16792 bytes
font_01_sfnt_off000105ff.bin
f347a491306649285eb47d1922cc6ef792b34613ffb92e4915f00e95c85c35bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x105FF 10300 bytes
font_02_sfnt_off00011d24.bin
d70fa480746960ad665409020c2a52ed3539223c79ddf9d64a2f500b525cb950
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D24 16668 bytes