Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad21f496607005b…

MALICIOUS

PDF

69.6 KB Created: 2021-09-24 22:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 32425753048025fbc21cc6c3a612fed5 SHA-1: 6335cf234dccac67c832a846cc4c7d72ea8321ce SHA-256: dad21f496607005b448969891155ec3343f93e4a96ce2165c04f98a709191b57
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common phishing lure technique, presenting itself as an image to entice user interaction. It contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads, suggesting an attempt to redirect users to malicious sites for credential harvesting or further payload delivery. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143afe1b41fa---sifokanasexadutetenole.pdf In PDF document text
    • https://network-italia.it/file/tikevapexedebogike.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/68498146109.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///rojenalenodujixozut.pdfIn PDF document text
    • http://philboyd.com/35473063830.pdfIn PDF document text
    • http://gyliver.ru/files/files/matipi.pdfIn PDF document text
    • http://www.pvvc.cz/files/19725844132.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/18572661270.pdfIn PDF document text
    • https://hexema.com/FCKeditor/file/jujajutumit.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/1e36ac0dc9779bcc86ac2ca130adb4fb/22411622196.pdfIn PDF document text
    • http://th-hl.com///upload/files/92675425770.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/pobipajor.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/23328006062.pdfIn PDF document text
    • https://praktijk-fix.nl/userfiles/image/file/buxetug.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/72374129668.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/17935318714.pdfIn PDF document text
    • http://smm-mm.com/uploads/news_file/14997759031.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/kifegigi.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/83282239817.pdfIn PDF document text
    • https://fishuntpesca.it/file/netezevatefukatati.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/raxavunojepilozimulab.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202109011636044066.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-1/20210901225651566142.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16140d4a2382ab---vupuzafufusodowolipedakov.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/62171631662.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=best+indian+photo+editing+app+for+androidPDF 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_off0000b21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB21C 10784 bytes
SHA-256: af5ed6d5043fcadecd93dc903f6fce4f3e24b41b39021f962ac329b49fc9e6f1
font_01_sfnt_off0000caab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAB 14264 bytes
SHA-256: d4e7ea552379bdcfe522cc655325cb7360d1b809db8cf0fd4068e5c4d5023708
font_02_sfnt_off0000edf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1