Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc6b2110810068d…

MALICIOUS

PDF

83.8 KB Created: 2021-09-02 05:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4e923396125464a0312f526fbdb90dc7 SHA-1: bac52c7235f8a3f58aef7656937ef77f598af96c SHA-256: 9bc6b2110810068dc389937802630aa900fbed308ea245f8d0110701fbeb96b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://prana.video/wp-content/plugins/super-forms/uploads/php/files/k1vr2i4cu1efmae7qmsk5qsrs7/61266838574.pdf In PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/d456c6ef92382395677067a3b32368c5/21437694536.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/a9dc10d1476dfa2d21de79a6345f8fc6/devubepubuxex.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/goguluxalowiburejime.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160739f9066e36---41959360024.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/9edacaea43a823f7c075d76b7d3cd506/30926017809.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/14489005397.pdfIn PDF document text
    • http://sxcec.org/userfiles/file/pogopigugixusurozetapef.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/264c18b3ee0076313c9cfc00b5122d63/xefoguvifix.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0602715f4---58976491095.pdfIn PDF document text
    • http://alexandercdg.com/clients/36029/File/pojipukorovivifawu.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/e8c77d94df753fd21b774e57093f514f/varebadexadegakezirimaret.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/bupeze.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/oppj1tvhd0hqlad5da1j7hkilb/dojozo.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/59518804615.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b314df888a9---63351385169.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/nevuposixosemipulavap.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/2928f85cfbc5920be4cf7f12e78f4a46/gigimezuminitufawilapo.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/97434810629.pdfIn PDF document text
    • http://ibb-online.ru/f/file/15462203601.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160adee28eea28---pevitevububixakemel.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/vuwidemurur.pdfIn PDF document text
    • https://smithsgame.com/calisma2/files/uploads/73751800778.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa34c88d06---gubiraw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=harry+potter+and+the+goblet+of+fire+transcriptPDF 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_off0000e118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE118 11144 bytes
SHA-256: 4ad8aed569796a48be1519ee3a8c052ec38270fe1669ce6016eb3c922e8b9921
font_01_sfnt_off0000fa95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA95 17968 bytes
SHA-256: e390c35020ebdcd7cbf75cc2803b6412b985a0ee33f7412a08a94070c60eb8f1
font_02_sfnt_off000128ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1