Malicious PDF — malware analysis report

Static analysis result for SHA-256 30349d966a0c1be7…

MALICIOUS

PDF

84.2 KB Created: 2021-09-17 16:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9dcfd26844a5a5dc82b8cd82823b9d3e SHA-1: 318ebdb71d5825b79faf08939910b6b5f0353a3e SHA-256: 30349d966a0c1be7f575a8a652372e0e399a29f493cf56bb00fe6d663b73867a
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis indicate a phishing or malware distribution attempt.

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 https://synerhu.ru/uplcv?utm_term=lego+ninjago+shadow+of+ronin+download+android PDF link annotation
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/83598253737.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce0f494238---51498491621.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613573f309409---patuse.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/nekulepakilowinot.pdfIn PDF document text
    • http://bridgeonlaw.com/filespath/files/20210915160509.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/monaxurowazatojebituwama.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/76982357693.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/69554094740.pdfIn PDF document text
    • https://mimpishio.com/contents/files/21468902064.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/jemamibutejilagakaxadoj.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/nowagexabitoxupa.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/83481997188.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/bejaje.pdfIn PDF document text
    • https://digbijoynath.in/uploads/userfiles/files/24146275360.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dfd2c0940---53782881352.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/pivubedosu.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/fuvipabukowaj.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/mivotakoxaxojulolu.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/49606082797.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/motigatig.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/diluzesowubudejab.pdfIn PDF document text
    • https://virker-ikke.dk/files/20803310882.pdfIn PDF document text
    • https://kingbakerypans.com/userfiles/file/buledosagurovafozo.pdfIn PDF document text
    • http://one9five.com/userfiles/files/36811066043.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/94327170328.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/93965391093.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_off0000e1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F6 18656 bytes
SHA-256: 5a3035d76377c8e777822e19346e4900b50ed71a07a0c1b081b8be4d9b3a9572
font_01_sfnt_off0001124b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A62 10708 bytes
SHA-256: d1f520327b0fa8e47538ea646ace40eff4151ebbba0a82a43917627f2851fb55

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