Malicious PDF — malware analysis report

Static analysis result for SHA-256 e620268c9c189258…

MALICIOUS

PDF

91.9 KB Created: 2021-07-03 17:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22af380acdbb7b5e7e53f77a72352157 SHA-1: afe78c2e66fe85068cdd607adbc433ba2a7a148f SHA-256: e620268c9c189258e7c26c289d8860e6062972ce3586984d56e9e3fbce3d7d86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high number of external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 https://webmenuplus.com/images/file/juwamamoxamijuxo.pdf
    • http://pelesiuvalymas.lt/i/File/vifovogawotixamube.pdf
    • http://flygarfield.net/userfiles/file/77094567865.pdf
    • http://okmarin.ru/userfiles/file/zefurukoje.pdf
    • https://chameleoncoupons.com/adgprocessing/uploads/files/23603712470.pdf
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/f1dc746f4143a95dc1e682cc161ca936/34910133074.pdf
    • https://communeouchamps.fr/userfiles/file/gezegipiwefixubupizof.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6964045800---kuwedapatesamupedovipom.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef0286b3be---wovipibareb.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160856119e99f3---68890009652.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/gqdsqiv4c2en6otdfbt2p599ua/7417888718.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/e61a08a3ec964a306885aeb39a14093a/vixapesegilalakibebixal.pdf
    • http://worthingtonpark101.com/userimages/betanuru.pdf
    • http://ipceurope.eu/assets/file/85458794403.pdf
    • http://ebanksunited.com/clients/7/7d/7da19d52c1086e69e61582739ce98a0f/File/61664705571.pdf
    • http://fdscience.com/UPFILE/userfiles/files/43500515379.pdf
    • https://supermagnum-bg.com/userfiles/file/69956300995.pdf
    • http://terezmisszio.eu/files/file/76595502452.pdf
    • http://sklepjola.pl/userfiles/file/74578655984.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607838e8768a5---98747617646.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160be0abf333d9---tufatigap.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9ca135da8---dimilupedasifaduxukewi.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db651f506f7---97606276109.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b4fd7da5c---pewojemimasimo.pdf
    • http://lycee-elm.org/userfiles/file/46853704703.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=minecraft+ps4+jungle+seed
    • 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_off0000fd65.bin
b926a4f0c5c0fe334f0a5ad6be3305fb4fa4d052bfc8e018b7344bb911a921ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 10976 bytes
font_01_sfnt_off000116cd.bin
7b3c491de80fe0ce9b04e06fbe9f0fc6f129542436807181a5faa1a107b20a98
pdf-font-stream PDF embedded font (sfnt) at offset 0x116CD 20384 bytes
font_02_sfnt_off00014a41.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A41 16792 bytes