Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c3eb04c08cc070…

MALICIOUS

PDF

84.4 KB Created: 2021-09-17 01:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 833e9d9f2de63187dabc86e891de7d76 SHA-1: ac038502821e97459b58e96a354cefdc3ac008d5 SHA-256: 02c3eb04c08cc0701df2b975c5b447da40a67884974c2fb99477d6b2b0784c13
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure or a downloader.

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://orig-shop-gsm.ro/ckfinder/userfiles/files/supuneniluler.pdf In PDF document text
    • http://miyozenemeryville.com/uploads/files/budidapilez.pdfIn PDF document text
    • http://honda-vo.com/upload/file/rifigubawenelawogajuj.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0d1856d10---58312973263.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/madikazilovo.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/85102332661.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/luzozowagovuzawuzaz.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/inqg9jt3ika82bf17pa3m7hqr8/runajamuguleporiwe.pdfIn PDF document text
    • http://seosanhrd.com/userfiles/file/siripigobenifowufez.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/zukifu.pdfIn PDF document text
    • http://khachsanmyngoc.com/upload/files/xasojixifetagebonet.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f8c40447ac36568b9c5a422f5fb67c0b/dexumijipana.pdfIn PDF document text
    • https://duel.pl/userfiles/file/25044755451.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/tufadegidebibabinugozu.pdfIn PDF document text
    • http://thegioioto.store/upload/files/naribidumemozolimazuda.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613227598118f---79535700754.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/40666095350.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/cd97a293117357a8f5cdb12f5c1ac02d/34143828439.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/87056699260.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/84099623007.pdfIn PDF document text
    • http://goref.ru/files/file/rifizizewi.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/xidilok.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/digezitiragivuxun.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/8305132773.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=programe+tv+online+gratis+romanesti+androidPDF 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_off0000e455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE455 17928 bytes
SHA-256: 3bc7e3fbb495b419ae106d226f5f9098336338d0e2c4033ca08002022560dee7
font_01_sfnt_off000112f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F7 10660 bytes
SHA-256: 50424221c2d11ac123206eacb9635ca3f98f09c5f2237a2b49bfa173c9185808
font_02_sfnt_off00012b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1