Malicious PDF — malware analysis report

Static analysis result for SHA-256 f11c204fc912c583…

MALICIOUS

PDF

84.4 KB Created: 2021-07-06 17:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5359bda61253ffb47a7a937cc365eb9e SHA-1: d240117b4afec62ec1a4eae16af232a6d71f5c58 SHA-256: f11c204fc912c5832b9129b98558aba937fad24c49b533c0507ca77eabf319ca
196 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or social engineering attack. The 'SE_CLICKFIX' heuristic indicates the document likely attempts to trick the user into executing a command, potentially to download and execute a second-stage payload. Numerous URLs were extracted, many pointing to potentially compromised WordPress sites or disposable hosting, suggesting a distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://menu2uplus.com/images/file/95954699153.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d63bbad1a7---1731130926.pdf
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pusako.pdf
    • http://liccuza.ro/stiri_files/file/12055335200.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/l22hl7p7hh8grthsetpod9ma9q/nizuvo.pdf
    • https://atcotourismtravel.com/userfiles/file/93460559322.pdf
    • http://viettelhaiphong.me/data/dulieu/files/sekixusofe.pdf
    • http://ehomeforeclosure.org/images/file/detidasesisorati.pdf
    • http://aliceinformaticasrl.com/user/pages/79338627717.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/0cd3804e5ad72f98e108258909f7e5a6/16452517183.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a99bd588255---guzebaboserimisuvem.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c1fd26ad1---vexujunurejilisusipaxebib.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/f5d8169a6fed3dce7bbdf85a97659476/31480598536.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e56ed7bbe6---vavuxegenugasus.pdf
    • https://stopserv.ru/files/file/49216936730.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/25klchgkv2q6sq02mkioc4v393/xujirewes.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67852b46e5---81927891405.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a49e69adaa---82453377866.pdf
    • https://blugarden.eu/file/12042802402.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9778637f95---1584869091.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/562c7c634e62edbd4c1013ed4128d4c3/wudigide.pdf
    • http://suamayin.biz/userfiles/file/97313947515.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/pit6siihrmtnbvavrqpq0okfs4/61807611088.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/a5ff46d7c2f0e16ef3a06b7eca808871/30071565755.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7c0f20c81---7358938077.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=force+to+quit+application+mac
    • 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_off0000e5e6.bin
b0914ff15965e3ee7490c6b7d298b8ab9d004307d73ae22a1d2eb9b1d912693b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E6 18028 bytes
font_01_sfnt_off00011427.bin
22936b149f727ea35a668980e89b9588380a8e31b76a0423d5ef1daf39906364
pdf-font-stream PDF embedded font (sfnt) at offset 0x11427 10592 bytes
font_02_sfnt_off00012c3e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3E 16792 bytes