Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74ca6a08ed5c601…

MALICIOUS

PDF

83.8 KB Created: 2021-09-03 13:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8d5801ee2d0919b6949b07465be29452 SHA-1: 4e07e701a36d495fb2b836f419a7e5a075ff3ce3 SHA-256: c74ca6a08ed5c601f45bc46d68be85bec8254de9d4c8c08966e2ba48bf9be302
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or conduct phishing. The embedded URLs are designed to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/6c96fed0b63bb5a5b866ad743749f4c0/16795751667.pdf In PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba1b43f055---rikugepogapo.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/dudetuv.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16126a4813f975---94768155512.pdfIn PDF document text
    • http://geodez.com/pliki/file/52882504542.pdfIn PDF document text
    • http://maksimetall.ru/files/18085615252.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/pokonugerexub.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/43612666401.pdfIn PDF document text
    • http://akekaluck.com/ckfinder/userfiles/files/10934163073.pdfIn PDF document text
    • http://muszempilla.com/files/file/dixomitojesatawatopupuke.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/bc69dd0557bbc177d3c0afa2f9a2a365/63885042324.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/gupobasosekowuv.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb190ed257---riruxenages.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607eddef2fe00---zupikemurekomuzupogi.pdfIn PDF document text
    • http://www.serenissimaservizi.com//files/49344828167.pdfIn PDF document text
    • https://marosme.ro/hirek/file/71342079990.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/32053673062.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/xitupulapogigiw.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/f94ae89ff4c4e7f0d1a8145fe4e080e9/66199683812.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/jetarexekikolefelarodipum.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/f333673024d1ca05798353326e589e7a/rodadifuruw.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b31a77653c---ropolomimugevo.pdfIn PDF document text
    • https://cooperspick.com/files/18722644932.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/0b1a605bed8cf2e40e5379a6c260f63f/vimowole.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/jmve7cqaeugqsookk5liliq1dh/82739168508.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161124c45e15f9---89877205738.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=ada+standards+for+accessible+design+2017+pdfPDF 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_off0000e217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE217 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 17108 bytes
SHA-256: efdb24c7f5e9242716cadaad07e9993b8394ed24bf263fce35a1cc560542faab
font_02_sfnt_off00012689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12689 11260 bytes
SHA-256: f5365fb3c566de4c48618cc623b708957726821ef276e35a5201f9e1b03fd886