Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ed2a9959c9099a…

MALICIOUS

PDF

86.8 KB Created: 2021-07-02 17:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b09ed2cc2ab4f75001c39bad7211baf4 SHA-1: beed697106ebda23e6f39bd784725086024a6828 SHA-256: 95ed2a9959c9099a3c2381b98ff8c37043596f335a6ea53e007a5cc197423d91
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised WordPress sites. The primary goal appears to be phishing or redirecting users to malicious content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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 https://philabc.ru/uplcv?utm_term=all+five+vowels+in+one+word
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/86b419dbfcc2a99176544d162cdfc707/jazumobonikotutat.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/bcee11ae5cd60df5ed68fde9f76293a5/bolen.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adec6b021b---39443637727.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7f8217166---gowarakigubenetixofoku.pdf
    • http://foto-klub.dk/userfiles/file/busuzujinoremimuruwajil.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/b7fbd96b326d36b1336ae959b7982b1c/85545601266.pdf
    • http://banphimchuot.com/userfiles/file/jojasedudabunomidetexozu.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca9046f645---dawobola.pdf
    • http://bestbuyfromindia.com/userfiles/file/sopipovogolewajipuf.pdf
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/kipuralasutizegebuvuna.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d15093dec0---zewinaviwodefataden.pdf
    • http://bellsazshihtzu.com/clients/878694/File/54593973106.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160826fcb26fac---72319070154.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b880123b4---17385659000.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/a784d543a49025767e5aaaf9f27f1848/34505515587.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ab24adb4dc8---wanize.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb73a1ea1c---polisusabivurevu.pdf
    • https://sharadsangam.org/UserFilesTwo/file/nulavaziminu.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608db2f61aca3---fubarenejosovap.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1607563885c593---93489745950.pdf
    • http://sanarina.de/ckfinder/userfiles/files/sirotenowimudonimofipiju.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16087ea867aba3---70940063715.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae3.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE3 16252 bytes
font_01_sfnt_off0000f0bf.bin
6b78bb78255b2870f37230fadb6a66f67a12bf5c159cc08ce3eb590cb492e827		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BF 17412 bytes
font_02_sfnt_off00011e76.bin
822a0d1e48b8ec5978d4cac194e67d7cdca07e6dfd34b7ae2c0a5998b9abfca6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E76 10220 bytes
font_03_sfnt_off00013590.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13590 16792 bytes

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