Malicious PDF — malware analysis report

Static analysis result for SHA-256 2332b4c314296ca2…

MALICIOUS

PDF

89.0 KB Created: 2021-08-09 10:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c89ab87176d53fffdda198f578c6e320 SHA-1: 563b9273bcbe86a25e215116f7632eaa1b5ff9a1 SHA-256: 2332b4c314296ca297549d7aab8e3d1991a6ad61c8e7bce4278a87e61caa62be
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The presence of PRC/3D content and a high ML classifier score further support its malicious nature. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/41f13e98eb382cdee3a30c8082127bdd/zenerumikiraren.pdf In PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/81425363419.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/66254710923.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/sokax.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/23c4381da7123cf1ae1ec41c72650f67/14153641397.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/najazuzozazawoleke.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/49992876981.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/58640795068.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/47349680091.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/97556592c47b8f35cd04c7cbafb5fe29/19918432953.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/1a09746cd0542e80ba06928b0415ad68/nisisigesedop.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/jupum.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/ralakoju.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd839849df8---45041802390.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/r9n5g1la028mh7eji1romlcbvv/wepozalotumutukagomax.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/96812729297.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1905b0a04a---bakujoxugodozafibodur.pdfIn PDF document text
    • http://michellesmithscott.com/clients/36670/File/feren.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/nuxojotixunuzutora.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/f2c6c062f7d8a014240bb641b55f68d4/nimitunatedimisibaxitevuv.pdfIn PDF document text
    • https://dolcezzecaffe.it/file/vewunagunakifasalu.pdfIn PDF document text
    • https://akemi.ro/hirek/file/69756394797.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=turn+off+find+my+iphone+from+computer+applePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 17276 bytes
SHA-256: f09062fb8b1015e3d6be6ece89d96313baf1e5b0628046d392dc5fcc3a8c4486
font_01_sfnt_off0001240a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C21 10892 bytes
SHA-256: 918c09e17758a5aecae1b6701aa956a38507578045ea3d604a5c61206885cba7