Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3a1175dde69cbf…

MALICIOUS

PDF

85.4 KB Created: 2021-09-06 04:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5266bde944860009aa4012f16acfb98f SHA-1: 463531fd50036d96e27e62a7fab5753fcca8f81a SHA-256: ac3a1175dde69cbf1469a0fd7848d19aa3f5666a90daa48e0a2e5019a7cbee29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to a variety of websites, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery through these links. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://laborke.ru/uplcv?utm_term=manual+spice+grinder+target PDF link annotation
    • http://elencostruzioni.it/userfiles/files/vuviburilufofiwamuk.pdfIn PDF document text
    • https://franciscojaviermoreno.com/DocsCKeditor/files/beserirajopoxitudolexewuf.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f2538ae9473---68549302446.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/64sc67ei225pc9nv4404uh8rv8/fexibepenupamobazos.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086408adc298---sevixifivotojujiragukira.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/rekiwebeja.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/rutanerexu.pdfIn PDF document text
    • http://compsult.net/userfiles/file/momodesibo.pdfIn PDF document text
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/penigiludexepoxo.pdfIn PDF document text
    • http://www.aukuras.org/ckfinder/userfiles/files/jugigefiroso.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/9toc7h0btf1debl8phnme9itlr/nowerosuxo.pdfIn PDF document text
    • http://thongthien.vn/upload/files/70823498726.pdfIn PDF document text
    • http://propellerclubsandiego.org/uploads/files/disigubojemupegesorev.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/bopogifenemodikowe.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/24359158361.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/govapufiz.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135308c4afdc---domixek.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609495ebc83bd---gavegasavebasikisenudo.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975698e48c5---buwenifinitebulodeborepeg.pdfIn PDF document text
    • http://makaroma.fr/upload/file/14611795742.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/18988121640.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/2a6a85e380c681d511955525011fa647/voxelikuwuxoba.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/selebonaba.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/56371135454.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/zopupa.pdfIn PDF document text
    • https://mimpiindah88.com/contents/files/majibod.pdfIn PDF document text
    • 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_off0000e7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AC 10664 bytes
SHA-256: bc1f77a9a467c6a2717189a439f30694131c2bb59f639eceaf3a5803129b4e56
font_01_sfnt_off0000fffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001180f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180F 18144 bytes
SHA-256: cb54acc7b3b164921d746c40b8ba16aa5b286d85642cd9f04a3dfcc5c9e89442

Open this report in the interactive analyzer, or submit your own file for analysis.