Malicious PDF — malware analysis report

Static analysis result for SHA-256 00552ac317d36f2e…

MALICIOUS

PDF

90.2 KB Created: 2021-06-27 15:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6c77a1442bf0fd75ad7f2e71f0b33a9 SHA-1: ff8fc08d48e2a1abe0831017f2cca50d26048399 SHA-256: 00552ac317d36f2e7d75fda4fa8400fea5dc382364332451bc8f45fdf000196b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware delivery vehicle. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/66866194123.pdf
    • http://shinex-auto.com/userfiles/file/zukigunuluremite.pdf
    • https://isabellepieman.com/userfiles/file/68429156966.pdf
    • http://dribblebar.pl/userfiles/file/pujivojem.pdf
    • http://baohanhranghm.com/upload/img/files/zijeludul.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c33b27547a---rosuriladat.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/es80ajupgsj6i0bnar30fj3k10/15568948319.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ce9b71187---51208470656.pdf
    • https://duproject.com/uploadEditor/files/pojukajawuzugewafitatafu.pdf
    • http://laweasy.kr/userfiles/file/tolewagokefixanulukofusu.pdf
    • https://barrierball.cl/ckfinder/userfiles/files/23957096475.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9de60f670---rojegojoladenatafapafaser.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9dfa955e0---48252325461.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d60c2bf07d---80162577303.pdf
    • http://www.radio-kum.si/data/files/gimawonones.pdf
    • http://architects-desk.com/uploadsfile/51355386870.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f162bb161e---nugizukinabokunumode.pdf
    • https://decoveinvestment.com/userfiles/file/67285016954.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa343133a16---xulanifefigesaxuvojutesij.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/8365of9iblqum5hqt1vo0hm2s6/48677527505.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/66525d3fdf39be1e8b07e02e3f88f122/linikunimop.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4784d9b66---kasuxaxanexalewenebigeze.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609452ed2fcb7---66424202742.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/9390e4675c06e7ed19518dd7f304a474/nivin.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/1ed6e8d0f57067861f429672f304b009/selaw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=best+app+for+streaming+live+football
    • 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_off0000fdd1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD1 16792 bytes
font_01_sfnt_off000115e8.bin
a8bbe24421df1164ca9baec59ae6d72091029e35b7a1ebaad4345c5f05d0918e
pdf-font-stream PDF embedded font (sfnt) at offset 0x115E8 10960 bytes
font_02_sfnt_off00012f30.bin
e73dca85afb0a565c52a6d2720d5282806da6f260a9cfe3d9b62865376a75de4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F30 16960 bytes