Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0e61a06d93c4e9…

MALICIOUS

PDF

90.2 KB Created: 2021-09-08 20:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9901a031758fb2bfab01a8912fcc47bd SHA-1: 54408bb2ed6c80a10c22618ab2efa6813a3eb750 SHA-256: ba0e61a06d93c4e96b5c4fc7c28a702f7edb7c6d7cb0a882e6d8b4431424a121
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343d4881b47---dibipakowagukimevenitaw.pdf
    • http://hasadtemizlik.com/upload/file/jogumo.pdf
    • http://ventima.ru/userfiles/file/gudomemig.pdf
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/bazetuwibefiberedodu.pdf
    • http://dominopark.pl/public/upload/ckfinder/userfiles/files/28952839091.pdf
    • http://internet-trade.cz/UserFiles/file/biludofexapabusuja.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136069ab1c4d---45598680656.pdf
    • https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/50618327337.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/7acc3b02c74a5bb6e66e5afb7f4ca0f9/43919511502.pdf
    • http://mkpstroitel.ru/upload/files/vubitami.pdf
    • https://himarco.ir/basefile/himarcoir/files/89832582675.pdf
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/74397651560.pdf
    • https://stabiactiv.com/userfiles/file/xuruzomob.pdf
    • http://dongshengcable.com/images/upload/File/xatubibubirojefa.pdf
    • http://www.puhito.hu/uploads/salizelogekavegujaguwu.pdf
    • http://grafitym.kz/files/file/sitinireniruvuronujinu.pdf
    • http://louisamerino.com/userfiles/file/setukina.pdf
    • http://yizhu580.com/ckfinder/userfiles/files/92881203828.pdf
    • http://laros.cz/UserFiles/file/bibemedufo.pdf
    • https://gregoryshow.ru/files/file/23443747088.pdf
    • https://gmnavarra.es/ckeditor/files/95377580649.pdf
    • https://naves.cz/res/file/34034363529.pdf
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/razuvitulukojapedobamuj.pdf
    • http://pkpneu.cz/userfiles/file/femefe.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612ece6a4d525---bajetaz.pdf
    • http://ozhelalikram.de/resimler/files/25796780531.pdf
    • http://chikatere.com/Upload/files/70384880904.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=collaborating+with+the+enemy+adam+kahane+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_off0000f5e8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E8 16792 bytes
font_01_sfnt_off00010dfa.bin
684f31ff9f3b34e21884d0709f1f192079deb123d399aec4a2bfc63548e8c9e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFA 19524 bytes
font_02_sfnt_off000140b1.bin
9e96a4c643b4f28d665a2b2c8a9a2a74bd4aed2f07c7f1b7b4a24e57e2f0dd5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x140B1 11240 bytes