Malicious PDF — malware analysis report

Static analysis result for SHA-256 0620bf18ff37c724…

MALICIOUS

PDF

89.7 KB Created: 2021-07-29 20:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f768f07aefc3232568974d1b850fb648 SHA-1: 758f20f69a1789c6d4bfdffc81a771d6ec0cf866 SHA-256: 0620bf18ff37c7243cbd8b98d129740d3283f6a7d262c4ba184989245a980057
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external links, many pointing to disposable hosting or compromised CMS upload directories. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to distribute malicious files or phish for information. The embedded JavaScript likely facilitates the redirection or download of a second-stage payload, contributing to the overall malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=declaration+de+vente+de+voiture+pdf
    • http://jhdljz.com/userfiles/file/1625442987.pdf
    • https://tradingphrases.com/userfiles/files/xixixuduwuk.pdf
    • https://trunglamdecor.com/uploads/userfiles/file/3704147814.pdf
    • https://callmarkinvestments.com/callmark/files/87580688273.pdf
    • https://ludifrance.fr/userfiles/file/8607076045.pdf
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/118f13c2a1106f69a96a68e6191effdb/23757354728.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16075a2b163199---givefari.pdf
    • http://aelma.com/sites/default/userfiles/file/75650372246.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/e4f52a1b095df9d8b70b3df8959081c7/79925723411.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1n3plhofm2g6pg74iurrtvpen0/78139055192.pdf
    • https://ebooksweb.net/files/file/35395088708.pdf
    • http://hintzfamilyreunion.com/clients/1/12/12a2788c5de59b93c87e4eff35998d4f/File/muzogafog.pdf
    • https://pmfegypt.com/userfiles/files/wipozenolebiwezagizoreb.pdf
    • http://aviapartner.biz/js/ckfinder/userfiles/files/58399428334.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/cddf0e89a614f393f7e9774a7108e219/jaraxuvige.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b550a4604d---siwumuw.pdf
    • http://tort-art.ru/userfiles/file/5718186644.pdf
    • http://ausafe.net/images/art/files/dolazeb.pdf
    • https://aluminiosarla.com/userfiles_arla/files/wefugarefud.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/5ffc398bb359f5d52cf45c6024391ef4/rozixubugisotosem.pdf
    • http://autohondl.cz/userfiles/file/39320543490.pdf
    • http://sevenseahotel.com/uploads/images/files/suminubuzikafokagim.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16089b5d494e6c---tonixemojowikadekilov.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/v8a5g482o4ra886bjoun6f23jp/ratixawilores.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/au3ij346783soet6dk9hej7gvu/zogafevir.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d23fa5caacc---sujanavovogupojojokojosab.pdf
    • http://normel.org/files/upload/file/tuwovasefazoje.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_off0000f93e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF93E 16792 bytes
font_01_sfnt_off00011150.bin
abcb38a27d23be2427f096efa7681449cb1fc5cf52196317b5f513be3eb8a77f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11150 18068 bytes
font_02_sfnt_off00013e14.bin
15e5e578f0abb1af87cd4dc44e87ae06718171734226706419c1c477314e1774
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E14 10612 bytes