Malicious PDF — malware analysis report

Static analysis result for SHA-256 060375fc3613f356…

MALICIOUS

PDF

69.8 KB Created: 2021-09-28 09:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8d945d04c5981227a4ee74b403f56188 SHA-1: a5d355b400a1b41982914770a442f1138c28164f SHA-256: 060375fc3613f356148cdaa573f000ae2f407f40fa90f01eeafd374855d6046c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://vxclouds.com/userfiles/file/69053049239.pdf In PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/vojis.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/pazimelowilepo.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/bovaba.pdfIn PDF document text
    • https://vas-vill.hu/userfiles/file/nanozamenepolisazeg.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/duvedosavolejegojebiwox.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/45619163345.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/3248195688.pdfIn PDF document text
    • https://malmospelmanslag.se/userfiles/file/xalediluzotixofax.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148f5da74279---jajuzimenetesudokawokas.pdfIn PDF document text
    • http://thewesternmist.com/userfiles/file/wefibakabuz.pdfIn PDF document text
    • http://chinazzjx.com/d/files/17134542876.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/nemisesiralenaz.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/fegibe.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/jawiruvipupumavemuz.pdfIn PDF document text
    • https://bloc-immo.com/images/ravixej.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/78572979593.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/161332e5ed4f5a---96116915016.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/defevul.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/48300125637.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/69256395926.pdfIn PDF document text
    • https://strefaokazji.pl/uploaded/file/24609039319.pdfIn PDF document text
    • http://unitec-egypt.net/userfiles/file/rinuguj.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161470909256dc---kuforelivarupa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=android+11+video+callPDF 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_off0000b0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C9 16352 bytes
SHA-256: 90a21fbf8ad2ac18051ccce65e418d0952cc523a3dfdc7e5773a897504c3a529
font_01_sfnt_off0000dab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 10196 bytes
SHA-256: 25f79f82e85ee53e988983b2a92318d9e93e3ab720a2cc6556e72301f370e4af
font_02_sfnt_off0000f1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1