Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde8ea6b620e2eb5…

MALICIOUS

PDF

87.0 KB Created: 2021-06-26 00:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6947b48dadb21d15fb19c836e9bbb741 SHA-1: eae9a0850f3188f98560f46aa913ae03fba2a8b2 SHA-256: cde8ea6b620e2eb5f2867a9525e3d2982995e85ac12b73f3ad3711aa5855e392
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, but the heuristics strongly indicate a lure for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://ketchas.ru/uplcv?utm_term=interview+brain+teasers+pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/2jsjiaep547r0vaucclemvh177/pujamen.pdf
    • https://textosolutionslinguistiques.ca/upload/editor/file/tefujigakafusozesevi.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/xarerijavesafetevadeg.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a43cbf679---xowidiguniretakukix.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/9kvave12pd35297sifv26bo3ok/xugikezijikebarotumazax.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/0354dba445331a3c00703a49c97a6027/58059650249.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/14daa02b1ed3a547a9aca447bbfc7d59/wosuwaxegatik.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b011497d86d---15276828200.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/n9sq0v5214l81r933pput1hei5/pakaw.pdf
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/26667809948.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/mqqn66lkfgrstuh4hcv8u0heaj/89540972751.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/vdlcen6h2jd0sldgamds4lmk3e/warirodisebim.pdf
    • https://al-wesam.com/userfiles/files/wazadakizenasof.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/ac255d2840ea672b97b4c588f3073817/97897503212.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ca5b18b52---31979954819.pdf
    • http://stlukesmn.org/clients/17773/File/fidasigokalejizivez.pdf
    • http://lucann.com/Upload/file/2179756293.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607176d864079---25290907397.pdf
    • https://schmitz.cz/res/file/55927160281.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff6ca428d8---pubomaxijedutot.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/5175e2b1751e8098055eba0517c6f68f/27519530742.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c77157d23---73559363911.pdf
    • https://mylodge-naoshima.com/16575870616.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 16792 bytes
font_01_sfnt_off00010ada.bin
ed9cb0d083ec9cfbed3a2db240efe7a7a444d0d24616865f2104b206bfab9d9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADA 16904 bytes
font_02_sfnt_off000136dc.bin
67cadbad999a359882805f810e2b4b8b0416fff646cdb701e8b6c40006e8dae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136DC 10568 bytes

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