Malicious PDF — malware analysis report

Static analysis result for SHA-256 94656d901f336bc4…

MALICIOUS

PDF

92.6 KB Created: 2021-07-05 17:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 150e93320f2f6708f5b7e1d621516b0e SHA-1: 4ea20ca1a2b252e993e8c8e83bd9e7300e7b1ffd SHA-256: 94656d901f336bc41e13d53613bd8cbedb7acd720b3416d9c675931b213e9e86
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous distinct hosts, many of which are compromised or disposable, suggesting an attempt to distribute malicious content or conduct phishing. The presence of external URIs and the overall structure indicate a likely attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://dobraukraina.org/sites/all/sites/dobraukraina.org/files/zodamixamizipazinuzijapi.pdf
    • https://communeouchamps.fr/userfiles/file/88187614119.pdf
    • http://tourister.kr/userfiles/file/xadidipabonozebolufa.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/0f62755ee49ab0fae84f8624200de0bb/94170535328.pdf
    • https://atamergranit.com/userfiles/file/dawuwipemevuvulakinuralo.pdf
    • http://kiiga.ru/userfiles/file/6987399309.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/c0a8228f55bb33c27017b5ba15c9e3a3/30520293018.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/b74d107653a6b377bbc035c0aa4c4047/nekupitikokad.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bu8ajfgl1hkt7e28lc04r6rk03/91673799836.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160846ac35bcee---63812071080.pdf
    • http://www.contectrade.hu/fckfiles/file/45909560771.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/6d9eff50f490f95f03d6c30a95f4be36/96430109465.pdf
    • https://allcreaturesinc.com/files/files/gomanoke.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8a333b015---worebemilenojelabipuku.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qtucuhisk2nq1284si53k59ll4/29226422787.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/da094078e7449cf870186650f57d6be0/wenutonu.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081d760e0e79---50219410438.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/50248959396.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/e6a46e7b90f26069a7b4cc1ac0e7f096/jagidomuxixigopikaxad.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a34839cb6---86401802431.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/6d836f73d3011a7b65b8ef3cc56fb780/gobakakipatoxewubo.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/46520fabcc2786abe43c231af52c9394/samifabupuvubawujojoti.pdf
    • http://thunderstar.cn/userfiles/file/20210525032036607221134.pdf
    • http://dissanna.com/temp/fckeditor/file/91838343657.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+get+a+guy+to+call+instead+of+text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd2.bin
45380fb9c3273dbff9b58c05d3c376748b6e74be4581952706bc920728196f14
pdf-font-stream PDF embedded font (sfnt) at offset 0xECD2 16628 bytes
font_01_sfnt_off0001034d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 16792 bytes
font_02_sfnt_off00011b5f.bin
86bbd0303d5ae81dd7b3fd379b3e53a0ce0dd9fdf4c137fa11db7f815496a704
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5F 17560 bytes
font_03_sfnt_off00014975.bin
089e8a65ebbe1cf104cfb40c8b14fa2826fb354eea807d48b8a12dc92dedc863
pdf-font-stream PDF embedded font (sfnt) at offset 0x14975 10944 bytes