Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2015fc50aa10892…

MALICIOUS

PDF

81.1 KB Created: 2021-07-24 22:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a7d374f164f136ad63bc4540f886767 SHA-1: 46b2ecceb0ed559ec42b4f0ca2a40dd91006b79a SHA-256: b2015fc50aa10892417b724b3baaeba7adeadbefa9883e6c39fe119d75d10ce1
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs, while numerous, do not appear to directly execute code but rather redirect to other potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094abcb448e5---xutenexumexolavefapur.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/irosf5sfourh6vdlcethj234n1/gowotidezalutimex.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/da9tfm6h7rdrll5k285s2qa7ba/29483930427.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/a9191de068a3a4148308540bb2f313e3/resuvowumovavetomosoti.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/46093188314.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bc572031a---dugazosufasok.pdf
    • http://adance0112.com/upfile/editor/file/zefusagiroxepomerunobi.pdf
    • http://archimax.ch/dynamic-images/cms/file/sojivuj.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/4c18f772781bc611e5b8a18b68a57ea1/73542030124.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16073ef4d468b1---89340306547.pdf
    • http://fw-simple.com/uploads/files/patadamozalomikoxesofufo.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/4497479ac77f346112e19b317ac01de6/44308113317.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/a7770b9ba727be5ce67af9433141253a/kufenom.pdf
    • https://www.carrentchiengmai.com/files/27593805551.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/087127fc0b5cde9e2dd3d04ff70bf0f3/towogopixodimoterapen.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081de8ac0bbf---93626193701.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083b59227f93---veluvaxu.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/073d6b1319da35060f08e70ef7edde41/gorugufujavagujajo.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c792ab2741---9362013930.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/26e74f1c112c5e7ca997571e9869a911/wevapore.pdf
    • https://contactfm.be/userfiles/files/30887005123.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075d8de99310---14730777042.pdf
    • https://africanresearchcenter.com/userfiles/file/427387919.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/fb6b882552d4ba960f3fef0d8b0cb864/66879704661.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=bewafa+hai+tu+mp3+song+download+pagalworld+mr+jatt
    • http://s292376414.onlinehome.fr/datas/imgmail/file/zudixumefopirirabubadatiw.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_off0000d693.bin
71d075b80dcc2c0b9513a312f3d8499d036337ef13be91bc2a979b46e8cf4054
pdf-font-stream PDF embedded font (sfnt) at offset 0xD693 16792 bytes
font_01_sfnt_off00010285.bin
2b72a338c7575a94b5486af8823c77c4f184987e3e177cc8cf437ddbd797a8c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10285 11488 bytes
font_02_sfnt_off00011d59.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D59 16792 bytes