Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d4432065e11dd3…

MALICIOUS

PDF

69.0 KB Created: 2021-05-06 11:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0a0ae647f70360384c8f921fa2e3b82 SHA-1: b5d8eab8f344f0451fa56384497708a26e9ad53d SHA-256: c7d4432065e11dd345dfbb637ff6289ecfd8556c678a13f044e144b6804039db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body's reference to 'Bhojpuri gana full hd video song' serves as a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pistant.ru/uplcv?utm_term=bhojpuri+gana+full+hd+video+song
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/6jfcaj99pa8cdg4sisilbagk90/68673122731.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073fa1bd6731---57121350039.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607495bab4558---duxamape.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/i3h0o6v6c0h3njrss2jg0roisp/joriwajoliminapelilopez.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16093a048603e5---xusixamobuzisenadujate.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8810f3b88---sizasomesajunegivef.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/ff2b6a7c7ab1aa686b81179cfb9e7ab2/dawurum.pdf
    • http://anhuicrew.com/upload_fck/file/2021-4-30/20210430110002152097.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/3af5132b660ff2042bdf09e089413aae/zomoz.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ni2nmndm84h0tlj706tj7ue8q1/pagabe.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797a62ce91e---38788309857.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/20ad6558096f3044cc30933687427455/gadilovolegujipiwu.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087edb57fa4d---16042088147.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160761a4def89d---bazos.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/647e193585797620984d2939fadc6705/67971669307.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfea.bin
807672573d8e06ae3329a78b3bc6a950a34374f675b9784f6dc227c12a0e1135		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEA 5488 bytes
font_01_sfnt_off0000e2a4.bin
9b7ced794e3706bd78128670ec699cbc57aeafcff75c079f9e465d0655177ed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A4 10724 bytes

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