Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4219bd6cb12655c…

MALICIOUS

PDF

86.4 KB Created: 2021-07-01 00:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 44ebd8f41d7d89dd7bbd87038b7c28e4 SHA-1: 861326f4f485650cfd6f1e1a3aff5dbb9d9b8380 SHA-256: c4219bd6cb12655c6ea25755235de7477cc4aece9dd868b16ec9025c61967873
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites acting as a link farm. The `utm_term` parameter in one URL suggests a potential phishing lure related to movie content. No scripts were extracted, but the presence of multiple links to potentially malicious or compromised hosting indicates a likely attempt to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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://chcial.ru/uplcv?utm_term=roll+number+21+movie+in+tamil PDF link annotation
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087cf9769a07---33433593009.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/c50c6d947821ba7857de69b8f09aa8a5/tutelo.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/1886d0d40553a0d8456d89d466231de1/11482096900.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/figiv.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/vimixiribuvasabuw.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/vbmntovolf5d98d70akid0eta6/95663324810.pdfIn PDF document text
    • http://webursitet.org/Files/file/74185124150.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/narilolujixosatezoguwopu.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c37c7a714---jebujowidopiki.pdfIn PDF document text
    • http://gibson100.com/clients/870224/File/42398151675.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/wowejopaxivudeda.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c069e3c517e---welabake.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/bidopi.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/3r03hj0aqamecbiuf1f3ggmbv7/34684175604.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160823a2971dcd---noziforazol.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/11b9b9ea71553ea4d07a682a789c6586/xosekapad.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/lapozadulo.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/2pcdev003ki8tooqutr5ngehk0/52223761263.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa2232e32e---nanepimisugotorikat.pdfIn PDF document text
    • http://amdind.com/userfiles/file/sutularelaxibunanok.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609821321f15c---71390546906.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/gilo9crrqjhsotirpnu8kd3q92/44534838714.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/48709745429.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/6emmn7krhe12rbve9pmlo25rqe/13119764032.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4c5e2653f---wejuvemik.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c8fcf0d20---vediju.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BF 16132 bytes
SHA-256: eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8
font_01_sfnt_off0000ee30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10647 10624 bytes
SHA-256: 72d46326ff49897cc12bf50cbb369ff47b71efffc61e827fef4fc1f48b72f558
font_03_sfnt_off00011e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9B 17548 bytes
SHA-256: ce32c69353693c9184ad348756a760b87257963b4299b8d8f90ae734bb436415

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