Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2ff2bef2adbe77…

MALICIOUS

PDF

80.7 KB Created: 2021-09-01 18:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 937e913d5e72373a239b3b1ab6fe6364 SHA-1: db2b18d8235078d14d8e75bfa5688d37772f65a0 SHA-256: 7b2ff2bef2adbe778f984221dc304c5eddc3088db55ef1e9a0ef268c02521191
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to websites hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://ranaghatpchsschool.org/userfiles/file/kisepelaranusag.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608245ba833f3---fadugasulinanipatukotul.pdf
    • https://ottopianos.nl/files/tukotobedamijuza.pdf
    • https://ltes.tw-goods.com/UserFiles/files/towopelakereludemobobu.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/ml6pqk6ecl7ph2hqdtqen6qjv5/pinatasozosavas.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/0f0fe61e344229a7a4e6e62d989db2d7/51615013546.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085e4e8116e6---fubaberobatokobene.pdf
    • https://habibitoursegypt.com/ckfinder/userfiles/files/jujowevafoxowumewixar.pdf
    • https://louvre.lv/res/wysiwyg/file/kipulufanexamexu.pdf
    • http://danfilenemd.com/clients/67744/File/pixuzisuzenopefajurapabu.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/46f7d6e13e1fa85b06caad8be89a655b/kuxifowaruxeberufazuvilun.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/b1c7da4b69e000f572054e2f48dc7caf/57773711663.pdf
    • http://tourister.kr/userfiles/file/subikepuwida.pdf
    • https://fzclicks.com/demo/files/editor/file/sajaguvoganixurosata.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/64a8a60bde3a40f99f2e3c9e7089d996/gegokupof.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b8d330e625---31144189757.pdf
    • http://elitsatodorova.com/uploadfiles/file/71931913306.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cffe8efec---48793886664.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/9904a66cd1ab17a3575ec164807bc81a/lipuroniwinutidizoxililel.pdf
    • https://ecohort.com/userfiles/files/vowelobefolalunelagiru.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/79r8eniab9t6strq6hpfb372v6/56759717689.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5072f58e04---lebuwowugokigeniwidinok.pdf
    • http://webinaris.training/ckfinder/userfiles/publics/files/kavisagimi.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5943c2cf4---vegenaginamulivasixoninod.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16082b8eff3a08---kinaxonixiranag.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/t9gm6nr50q66lnad5ppi0c9vk2/luxab.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=convert+autocad+2018+to+2017+online+free
    • 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_off0000d195.bin
a1fe27dc3aa856815b65dea45536e903466d1a5f032dee8ec6621c331b3ae3d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xD195 18352 bytes
font_01_sfnt_off00010173.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10173 16792 bytes
font_02_sfnt_off0001198a.bin
38246fec434093ffac92cf01653b8acdc7aae3e91d042cce95eedf2791ca5ebd
pdf-font-stream PDF embedded font (sfnt) at offset 0x1198A 11048 bytes