Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8d7cb1b4665f0d…

MALICIOUS

PDF

86.0 KB Created: 2021-07-02 18:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ed996c3e8bcf6b2292aff751ab5c57d4 SHA-1: 3819b9e1845b95beb3389933333f6c12506be62b SHA-256: 0e8d7cb1b4665f0d6ffd75661fbbdec971699e6c2aba99cb3046be59cd382334
196 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to various PDF files hosted on compromised websites and disposable domains, suggesting a phishing or malware distribution attempt. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely prompts the user to install a browser extension or update, a common social-engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://nepalimodelagency.com/userfiles/file/neginoduvo.pdf
    • https://myphi.biz/nbloom/fckuploads/file/27345393328.pdf
    • http://banglatalkies.com/dynamic-images/cms/file/jivixinujadofugijudiriwud.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad77726d95---mekapodovikogasibuki.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e975a8bb38---23584139215.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b7696a58fbe---93637458451.pdf
    • http://lmyc.net/clients/875386/File/mujuvozut.pdf
    • http://pietroquatriniarchitetto.eu/userfiles/files/wuxagukuluvinobik.pdf
    • https://cafesca.org/ckfinder/userfiles/files/rifujevenanuwizesotolibog.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b79f0d29a6c---gulerojisisizukap.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16085906495aca---kerusoluxowu.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad910536830---jivipopimukewos.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/a27899f5f0f8bf3cdbcfae6977cbf67e/lerirowowejozexufale.pdf
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/57317515645.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/1c0a232236c7c647b7b01bab56212389/50131503857.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/2n6d7ti9ijgeu79esjk7368kd3/6447150768.pdf
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/556e8143848db07383acd1157c9d98c0/15095645295.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073cc6577520---14015456561.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/lb4tcdo18u74lcerv0ftchn5o1/dafiwikesad.pdf
    • http://acrclubinversores.com/files/galeria/files/raburakateku.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99e3cf06f5---22789815985.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=csv+file+to+vcf+converter+online
    • 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_off0000ecc0.bin
567a94eb2a4abffdf4e903e02ec46476c8e9162099c586bfce3da562964052d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECC0 17784 bytes
font_01_sfnt_off00011b85.bin
0bb96e93bf8be0b9ed32133f8347a1943773c2ed1770806522d4f3631ef0918d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B85 10264 bytes
font_02_sfnt_off000132c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132C7 16792 bytes