Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e94af245608c7d6…

MALICIOUS

PDF

83.3 KB Created: 2021-06-30 22:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56ff22d18e3d65a1d05b03ac9ffefd77 SHA-1: 0178c07e90ba89dbfbad54d8c62a9e24c17f5435 SHA-256: 0e94af245608c7d6c1be655d809dfbada04277a10c9286756335e5bf51b6720a
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and unreadable, providing no direct user-facing content but reinforcing the nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://allaboutdowney.com/userimages/33305222894.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb9eb7b145---piguvazuxazosukila.pdf
    • http://kayapaliinsaat.net/file/wawinuxatesekisimevegexi.pdf
    • http://lookkorea.net/userfiles/file/momejuramibarep.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a711ac2f9---36754284617.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e2f0c5089---selavutin.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/59160a92b08e814c39591c78be5b68f0/31586771346.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916950be2c8.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160855a66ae468---91529349427.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a91b17a241f---96005159289.pdf
    • https://securityguardsupply.org/php/uploads/file/92391459020.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607570f0aa6af---tusunas.pdf
    • http://animationcoach.com/userfiles/file/413249236.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbc3af3262---nitonaz.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/29e2802066b017a71196d5b24343a83b/rinevewoxupeluzabipaxepab.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/b25ae1f8f5efc58c059c095c2acd0fa0/84749344964.pdf
    • http://ohsclassof73.com/clients/9/9a/9a21b0b253f7c4eafe662346d237c286/File/nazozimupojekib.pdf
    • https://eastmanllc.net/ckfinder/userfiles/files/jofev.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf4fba7a70---wasusa.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/2c2bbaeb02112d0a30a500aceab4b086/musixedotobajojef.pdf
    • http://delve-cr.com/uploads/lalup.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/ce6789b01843148eaa3602cfbb912c75/1234038941.pdf
    • http://tylerdaynursery.org/clients/8/8e/8ed7c4ff1d995b028c1180c1bccb3f4a/File/kenuxukama.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/804d1f9b2e1d73bf5d471cf41e19ef78/bobafovixavofeped.pdf
    • http://schokobrunnen.com/idata/47064195491.pdf
    • https://alternativecarrepair.com/userfiles/file/xivefifa.pdf
    • https://greenfuturevietnam.com/Upload/files/38312873959.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608344c22a627---sitagizatotid.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=crc+model+in+software+engineering
    • 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_off0000e110.bin
37ce583037eec32d13ed4096cd5d6b1ec52d6edf531e641f1f39263e28687b6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE110 17272 bytes
font_01_sfnt_off00010e67.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E67 16792 bytes
font_02_sfnt_off0001267e.bin
84c184965bea5c2ac55eda175ea9872dc5db820a6b20dcfe89327efc38f4b5da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1267E 10936 bytes

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