Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0ce58c23af1214…

MALICIOUS

PDF

86.6 KB Created: 2021-07-10 05:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e35346cb60f4d1ea95e259c0bc4e0e6f SHA-1: 31f61d30520b996c04c43aa735844d73ead96eb1 SHA-256: fc0ce58c23af121446422aabdd5271046214af5b0f6bac60230e667c44863292
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised CMS upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a download button lure further supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=how+hack+pubg+mobile+android+no+root
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/pe3hpbfb0f8v1fgjlo9p4rev8m/zenimexenesomitobelam.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/66daf94d422465bbc74902bc14fcad45/9969395725.pdf
    • https://infotechb2blite.com/bot/ckfinder/uf/files/62631089692.pdf
    • http://orem.mn/uploads/files/mofagujofomuwudelup.pdf
    • http://zhouzhuank.com/v15/Upload/file/2021782043575488.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160e12e4543e6a---26196510783.pdf
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080ae1c5490d---37773061953.pdf
    • http://advicetao.eu/pictures/file/8696199514.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16091cbfb4dddb---bodegosige.pdf
    • http://soupworld.de/upload/file/47961885894.pdf
    • http://bmhs71.com/clients/c/c9/c97ff408e01126d63256cf68004d6641/File/32989262536.pdf
    • http://vieclamquantri.net/upload/files/35693533398.pdf
    • http://visit-pune.com/userfiles/file/nerebetazobemexojume.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/70590f451409ad823ddd5fd15fa144c9/gutovuv.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/855a8ee8f9c5c9dcdde9f11ae42b3a11/15007573006.pdf
    • http://4yoga.by/pics/files/93832105391.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16098a6b681dfa---39551906512.pdf
    • http://www.annaleehuber.com/content_files/file/lajemedegugawebegam.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/lujinugitupokogofimed.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/cebe365f91b59c48c316a2bc4331b3f5/85979934404.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/f55u222tkm25fnkb7e9rejvobh/gefulanu.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc7ef46357---gudimenulu.pdf
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/0f47bb42e8a8ec23e29f0916b7de6656/zoxoxujidonolupavuduse.pdf
    • http://amdind.com/userfiles/file/20191579634.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160980858936ed---supibunotulejoxif.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abb491e9d48---48766753046.pdf
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/lafuso.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ee.bin
c1abb910db3325e5a5649d82c6b06dfb13390849b8ebfe7671d299d3f5c87aa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EE 11200 bytes
font_01_sfnt_off0000f28a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF28A 16792 bytes
font_02_sfnt_off00010a97.bin
00b4dcaa694a84900162c5e104037756df3fa6bb3464ff7acce21fece1958723		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A97 2496 bytes
font_03_sfnt_off0001154b.bin
a63ddbcea47c083341e0b29597669d1edfd61c62cf7d3295094b8f78d6cb87ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1154B 22412 bytes

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