Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0355b3022a5889c…

MALICIOUS

PDF

89.1 KB Created: 2021-07-02 03:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 26e9668ed1a3351ef0e97072d264f26e SHA-1: aab0c913291f4b1a2f8ea3a574072f8d8624c568 SHA-256: e0355b3022a5889c6f692f820adccfeffef3097da326f71d1da570ee4386c545
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs and the nature of the link farm point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://lesfeesdelhetre.fr/upload/files/27530541559.pdf
    • http://fairway.cc/images/blog//file/39156919481.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/d518cabf796c587a2241e7815393ff58/gumakudixafegudegivo.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/0bc6c56c8595baab4aae05ce357d583e/39784449055.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cd94e39b8---logilekizobopa.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a440db315d---15748147474.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/ctgccjhqsh4en4l1g0hnavn5ev/gakirixulo.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/19h71rvm2ma7ole5akklvbocg6/29483916980.pdf
    • http://challendor.com/fckeditor/upload/file/65151771616.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb328216e2b---44552033883.pdf
    • https://proxus.nl/file/58853792188.pdf
    • http://massageindex.nl/images/uploads/xaxuvefemizubede.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e69d1dab8ecfe301baa186c55fcb21a5/66794513730.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/qu31kdj4v7nbveo5ita690i004/18544567704.pdf
    • http://weymouthhighschool1960.com/clients/9/96/9679770cb43d952edac6f872f7aef95c/File/tuniminadesojanuw.pdf
    • http://kmkonsult.cz/userfiles/file/12753889899.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/65e2fefe91f5cad8169fa0803008bc64/rakoxojotulosepinal.pdf
    • https://dgssu.com/upfolder/e/files/20210626142729.pdf
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/046d81spscd0blmo8gttcq1rd9/40135324863.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/8f261e767f80e237deac7a9d8ec52d92/45902485275.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cbf65e33e---25174471715.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/6tejnbihdung3jducce2d0jbq7/futegebididage.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/2kkol2fdbq3gls8r3t01jp4s13/17932828045.pdf
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/ictjpkiodbbhq3ima9jrsfrvdj/zizagudeke.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=jesus+said+carry+your+cross
    • 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_off0000f98e.bin
475e547a3c07fc5d1b55ca5294f372a770a19e093f4b6a700d5f8b139e272889
pdf-font-stream PDF embedded font (sfnt) at offset 0xF98E 17232 bytes
font_01_sfnt_off0001262b.bin
dfe1799b5490f02f172682d22015b79bb4e2d3d0c36d97cf40dacba967b9fe86
pdf-font-stream PDF embedded font (sfnt) at offset 0x1262B 10320 bytes
font_02_sfnt_off00013d99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D99 16792 bytes