Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14ce92a2638c1e4…

MALICIOUS

PDF

68.7 KB Created: 2021-09-18 08:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 561896a6b27bdf69915ba43f1eeed014 SHA-1: 299a56c9fe1994a786aec441adbbd9b2be88a9cd SHA-256: c14ce92a2638c1e45c2de051a41b6b3823fcb2d1ffcbc9912d8b750c9f5c7cd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading malware disguised as a game. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded URLs and the structure of the PDF suggest it's part of a phishing campaign, likely using JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ketchas.ru/uplcv?utm_term=download+gta+san+andreas+apk+android PDF link annotation
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1614522f758142---81185323806.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/163172544447.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1614434fe6942b---lireponej.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/pokofano.pdfIn PDF document text
    • http://ttfi.org/app/webroot/userfiles/file/46173427602.pdfIn PDF document text
    • http://nguyenphat.com/public/default/ckeditor/files/poxisetotavexanikajul.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/26428073995.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/lejolilobemekikobapunuk.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/70390186517.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee9e444835---gepanadixadilakejaluna.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/derafazetovuvejukasozem.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/zirij.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f903d9306b2e43af2fa6a7ad6903ff86/fijal.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/92221047299.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/14734775413.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/131396032.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/lizesetavipabimigor.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/49345255207.pdfIn PDF document text
    • https://italvaping.com/file/sivutasuboku.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/xowav.pdfIn PDF document text
    • http://agilesolutions.in/uploads/suvopelixufizikasizuxawer.pdfIn PDF document text
    • http://aerotherminsulation.com/userfiles/file/fukukutikoxovapologode.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d1bd3b309---29379758426.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_off0000b02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB02E 14568 bytes
SHA-256: 413f0e38682c77c82313f07cd6164ebe04b12d30082c2332ee06b2859d76c0f6
font_01_sfnt_off0000d4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C5 10744 bytes
SHA-256: 2164fe38f8a2dae9eb35a51a9941d1592660162c498fd20e54f926c2eca7f7d5
font_02_sfnt_off0000ed70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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