Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbae0dacf4557c14…

MALICIOUS

PDF

82.5 KB Created: 2021-09-21 15:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 53fdbc5488a9537eaf0cb39f1130a5a1 SHA-1: b36c7b8b1b513573ccb9276b0eef0745c8669324 SHA-256: fbae0dacf4557c14c25b729ae30ca150d99f6f2dc2053c0765fc19757174953a
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 embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://calson.garment-pro.com/ckfinder/userfiles/files/foxaxudugagi.pdf In PDF document text
    • http://dsraxys.com/uploads/62974326570.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1631164744.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/29964254253.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/forimefuroluja.pdfIn PDF document text
    • http://mislenyiallatorvos.hu/userfiles/file/jetejemuluze.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/luxujonavevedabafef.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331cbd9bc72---punojuxopijixexazuz.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d34a815938---vigelagewemusizut.pdfIn PDF document text
    • http://paglialonga.it/userfiles/files/69972901571.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/zaverido.pdfIn PDF document text
    • http://dfanchem.com/upload/files/jizafabenadomaven.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/067fc12bf34f4e412627d310bbc7646c/dupijugisabejetud.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/fizamuxajofanofemuki.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/60331771020.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/xazixuloxe.pdfIn PDF document text
    • http://rld-carbon.com/file/depozufevujipuzavif.pdfIn PDF document text
    • http://proallprint.com/userfiles/files/63195096225.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/zatosudaw.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/13455680600.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16138566fc053e---rasajimajererosovimekuwi.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/eac965ed0612d5d1b2f48f308ae96864/73683953250.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b657831f9---mokazinovo.pdfIn PDF document text
    • http://aeklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lelalewap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=captain+america+the+first+avenger+online+streamingPDF 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_off0000dc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC96 11024 bytes
SHA-256: aee73c0268655e3f431e79cd253bc50a8070f897747e20669d623a5351ebe9fd
font_01_sfnt_off0000f617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF617 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E29 17576 bytes
SHA-256: 2b6a7bbe85225cb12c06c1445c8442776f135d26ff1ffb9d605ef77eb567c8b6

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