Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0ae30d08831a97…

MALICIOUS

PDF

79.7 KB Created: 2021-06-27 08:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 367723856c74df13f467a4fd323c8fc2 SHA-1: f76a908d92c96c953e63472e912ece97a91adb0b SHA-256: 1c0ae30d08831a970517a733eb3381ad5ffe9b7e02201bfd32871a79d793627c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to distribute malicious content or redirect users to phishing sites. While no scripts were directly extracted, the presence of numerous external links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/pchc6ucfbfikij5hj1bp14id74/butewigiza.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/de30024251a9fcc5511281e2b115fd15/vutapaxova.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/qj8hvg89ecf260g2hmc44di1k1/sijedij.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f83eb43bb7---93026815300.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/h3rr32h1j8la7r9lalesis5hug/nuwatuzumazimirim.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/d179778dc9d564a5f7fadfaa11e6c945/jojemetalesixobavi.pdf
    • http://chinoboxingclub.com/clients/36032/File/73703584361.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/oqp4a20mlle4gffk82vm89uvu0/13108562326.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e44df7a819---mokaded.pdf
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/49879977795.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/343865a3d39b545357f65bef8618a002/nubadig.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/4014ceca80ddf303091119c4fc54b9e7/48468680243.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6b227b0f8---63473654310.pdf
    • http://mppscstudy.com/admin/usercontent/file/guropagamasesejezife.pdf
    • https://catequesisnavarra.org/guiarte_userfiles/files/gifafawaligejeko.pdf
    • https://nanyangtextile.com/userfiles/file/43021292052.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080754f7d824---13736110021.pdf
    • http://rheumatology.institute/upload/content/file/dikidilu.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/79c3008fefcabf15889b16918ae8bf32/55920444358.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b06eda8eb0---4937763586.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c4060305071---zoxenozowevovifavesin.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba4d3ed8c1---2676230894.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a780d3c4358---fudarigoderatavatopofapa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=bengali+meaning+of+crystal
    • 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_off0000cdc7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC7 16792 bytes
font_01_sfnt_off0000e5d9.bin
8676ee92a9aa5041293cef47385a1c8eccc68b72d61d04e103a874230d613978		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D9 19244 bytes
font_02_sfnt_off000118c8.bin
9e02e7b800c9d2a50eacde192d82583ece2577fb0823d25c66c2d707a0b50501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118C8 10844 bytes

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