Malicious PDF — malware analysis report

Static analysis result for SHA-256 484cabd41d39f992…

MALICIOUS

PDF

91.5 KB Created: 2021-06-26 16:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 129fba50b825e51561a1c998b48d2124 SHA-1: 842a377e681fd0b52a73f8f5af4857c4a7b5acfc SHA-256: 484cabd41d39f99219fdee83b44391f94735f0253a6e448ab929290ddedf254e
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to compromised WordPress upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The primary attack pattern involves directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://mynigaoe.com/upload/file/20210514131646.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160719328e3d01---90231062810.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607937ac6e6ef---92995870727.pdf
    • http://akinmedikal.com/uploads/file/nuxoxelisidefusegukudaf.pdf
    • https://tavio.ru/files/file/48406571222.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abfad07e0b2---98006760623.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/9bd1eca6bb361466e6271bbfaa8b1630/66147060041.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943cf760b1a---33952281212.pdf
    • http://ahcxdq.com/uploads/file/281950171696.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/9e17eb44c08b13d0eec57f912946ccd2/74827768021.pdf
    • http://prinsart.ro/uploads/files/32561394627.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/fn1b7vc5rkoduqevn3ke2mnhn7/rilenigeranesezerig.pdf
    • http://hopkins1983.com/clients/861771/File/51782771292.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad4fd25f68---munabevabiba.pdf
    • http://amirafouad.com/uploaded_files/file/luxejobujijukaj.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4a2afui37bvj8fntd54efr0hp3/fifozun.pdf
    • http://01host.ru/userfiles/files/90398692735.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746894dfa64---36107758470.pdf
    • http://alwaditrading.com/userfiles/files/68510982642.pdf
    • https://avgdesign.com/userfiles/file/80714212078.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cddfb0c34c---fexofigu.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160996082f32f8---57436917112.pdf
    • http://hydrogears.com/survey/userfiles/files/1807135739.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=informal+letter+pattern+in+english
    • 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_off00010530.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10530 16792 bytes
font_01_sfnt_off00011d42.bin
518a9fea6472f6caa76fd18377ff3933036d97804626c95764ffbc6e143f238b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D42 16556 bytes
font_02_sfnt_off00014846.bin
d4ead9a330c21c1f7ffb68daae0ebe18ad85e5ffa2139fc82e06928ff1014b92
pdf-font-stream PDF embedded font (sfnt) at offset 0x14846 10756 bytes