Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b444ede11d8c16…

MALICIOUS

PDF

85.7 KB Created: 2021-07-03 21:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e38914875f4337e809a5de914d04b2b SHA-1: e2eb08b5123b946ad7b4cacb97a764ca477aa1ac SHA-256: 14b444ede11d8c165bdf57eb9c132e22559a8d2d4fca4a0278e7004330f929d4
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to potentially compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or phishing sites. No scripts were extracted, but the structure and URL analysis suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a964ecdf97f---fawufenezebupifafawidi.pdf
    • http://mmckno2010.zkosuchdol.info/files/mixesowo.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a58fcc8dc---dovepopokixazanafuri.pdf
    • http://raegcafe.com/uploads/files/49271419372.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/p950f1ba6i6pbmmjmhr2iqp764/36181957622.pdf
    • https://oklogistic.lv/upload/file/483426497.pdf
    • http://chi-kara.net/userfiles/file/kelem.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/r5k3qsn77gdf78785dp7q2v9jd/24722784517.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/03f4d7ddcde072b53fca89361b085b90/88148480890.pdf
    • http://shukokai-voves.fr/userfiles/file/mifunagubunimapora.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/c173f8cc71a972aa70dc3d908ca67e97/82716247637.pdf
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/woluvesowewovagobex.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/93dicbpu0pb08d6j36p550hbu7/93724352304.pdf
    • https://aspaeng.com/files/image/files/jolavig.pdf
    • http://poltinka.ru/userfiles/file/2669789310.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c208643633f---77305184829.pdf
    • http://www.awakohchang.com/image/upload/File/6875911179.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/4406e40e5b6b3f2f32e46a3b4848c252/jimevo.pdf
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/47617880375.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9894b62669---9800256432.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f596eeaf7---baxonidexawixelimofinif.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a1106a2ca9a---rimunojumatalodenuz.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=toad+in+the+hole+6+sausages
    • 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_off0000ebad.bin
b96a66c94a9fa7b212a062661c27b65bbe09da8f1fcc173d797eceb4da5bcb32
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 10660 bytes
font_01_sfnt_off000103d2.bin
955b53fe9df8a2e78b3c7c30c9374da9dbd461a4abc8c93ac944223deae1af1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x103D2 17756 bytes
font_02_sfnt_off000131e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x131E9 16792 bytes