Malicious PDF — malware analysis report

Static analysis result for SHA-256 306b244b6904db3f…

MALICIOUS

PDF

291.4 KB Created: 2021-07-08 09:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0eed050b5830336be4c2dc098c5bee4a SHA-1: 195e3a1fed866a2fc251baf1f64b92fc6e12d7d5 SHA-256: 306b244b6904db3f8079857baf017b8ba704fd34de66b72238622acc5bcd8cfa
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload storage, suggesting an attempt to host and distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and linked URLs are indicative of a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9714

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://terezmisszio.eu/files/file/fuxipiletonaxeposidefot.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607741631b886---21471147647.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cb33bc9ee---tupomozodibagoviwiko.pdf
    • http://bukharajohnscreek.com/sites/default/files/file/kamenovarewasolote.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/sh9iqu54kvhvm4etdoeuco869j/tanaxukilapevanigosusa.pdf
    • http://elm3rad.com/file/fegemujodoxew.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160847be7bf279---boxenubivakiximudi.pdf
    • http://starwindows.ie/ckfinder/userfiles/files/1156703135.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160718775d666a---72884229919.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/2e42613191f0135993e31189c56e15b6/48539930909.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/7761emv0sfo03aj96sedneo7i1/57927212370.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/ab49c6197079509ff46e2534c5623c29/kezilitosamexabumox.pdf
    • http://konditsionery-reutov.ru/upload_picture/file/bovuver.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac82d791345---jitupake.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc87e16e98---vevekunexofepomav.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/c28ad079c3461a21246a33d29d911e3f/vozakezibo.pdf
    • http://raylutickenterprises.com/userfiles/files/fijopoleloj.pdf
    • http://urbanconstructions.org/images/uploadedimages/file/28299890666.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160827184660cd---lunogupuzedaxejifu.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608058fe89279---lurigukijufi.pdf
    • http://puginternational.com/ckfinder/userfiles/files/gakum.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/be79a228eebed050e16b4f2901259a4a/kifefako.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160888c7b939a5---savib.pdf
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/99597230977.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=hey+there+you+with+the+stars+in+your+eyes+lyrics
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00040016.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x40016 16792 bytes
font_01_sfnt_off0004182d.bin
00e34fc36495105e6c53d3257b0fcc391203e669ba119e2c473e29274922f8e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x4182D 10616 bytes
font_02_sfnt_off00043072.bin
c43337ab531c316ee542d31365f5eb51aba5c56d5291de8b793f1f1833eb5db6
pdf-font-stream PDF embedded font (sfnt) at offset 0x43072 16512 bytes
font_03_sfnt_off00044735.bin
fb216e1f88424f7ba7da71ca5ee0284c528a3e4789fa692ce8dd7a2f9ae41956
pdf-font-stream PDF embedded font (sfnt) at offset 0x44735 19836 bytes