Malicious PDF — malware analysis report

Static analysis result for SHA-256 d33baab301c54d6e…

MALICIOUS

PDF

91.8 KB Created: 2021-07-12 23:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc2bc0cf0e225e9e2e8745181641b02e SHA-1: 8b5a710f5e9179090d5bba6a9019084f4ee33ca8 SHA-256: d33baab301c54d6e4515313c7e02b3ed650a14b197b35f12c0158e8a52956527
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF file contains JavaScript actions and is identified as a link farm, with numerous URLs pointing to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/mp1nml3h4skcdirvf3bjodtatl/jevirovimuvadeniruzazomo.pdf
    • http://seamacros.com/upload/file/wawifaj.pdf
    • https://egokituz.org/files/galeria/files/60571855921.pdf
    • http://lorichphoto.com/pictures/file/52814279822.pdf
    • https://angkalaris.com/contents//files/zinuxawulafinidite.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e6e39add0---xiluwonafejewexi.pdf
    • http://archinfo.ru/uploads/file/33171111924.pdf
    • http://penney1970.com/clients/7/74/747debde904cce1d9d58e62e9103e361/File/xikudoxagal.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0949ad8c92---gilokepefozevarilonot.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/902g21kkf8mi0doaa0ba8o05tj/73930370142.pdf
    • https://blnk.eu/userfiles/files/guliluvabirugodamevap.pdf
    • http://hatowo.com/app/webroot/uploads/files/zedikomirabupopawasemod.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607d120060e39---70333315003.pdf
    • http://montgomery71.com/clients/34132/File/67408102187.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/38164c8959d88fe90c2d6420335adf7d/bubuposukup.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a16d7615952---36626751565.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/r65l71pkq5s4u50jiaim75mmcf/29098018883.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/47d7d640727770581ef3385816cc6808/8118856562.pdf
    • http://www.awakohchang.com/image/upload/File/211133952.pdf
    • https://cissud.com/uploads/ck_editor/files/sivijixipozutozabinevo.pdf
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/29602656404.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072f0d4779d9---fazenisu.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/2202b44afb3c3f3bf285dd24253c63e0/sudebalitagukegesuraga.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/rfru8c5p62m8p9ood4as8343u3/sulimesi.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/2e586c1ca26a9763f0aaafc80a67fd13/28804560026.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796fcaf1642---40166873339.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/b8c37c026c17c4bfd82f3f5627f57be7/77414681664.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/3161f7017990a03e2f393050ef67d2d0/69981400662.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=area+of+circular+cross+section
    • 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_off0001064f.bin
282b7d365a8a11471f3af178c8425bf0278d697b67b2abf05876650933c46b26
pdf-font-stream PDF embedded font (sfnt) at offset 0x1064F 10408 bytes
font_01_sfnt_off00011e04.bin
f3404cd3187570a251704d881a6f6962b5c52360f474b6cb8c592d0e05982eb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E04 16932 bytes
font_02_sfnt_off000149e3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x149E3 16792 bytes