Malicious PDF — malware analysis report

Static analysis result for SHA-256 3792a943b976df9c…

MALICIOUS

PDF

70.1 KB Created: 2021-09-28 10:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: aae8a0a759ee7fa49b717298270155cb SHA-1: c127ad58a7a7ad96d45a425b8984d0617bcafad2 SHA-256: 3792a943b976df9c655eaffb0ead83ef844a5ef640468199f27ba19461e8000e
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 http://mobilahomedesign.com/userfiles/files/tunonubavujazomidukow.pdf In PDF document text
    • http://aguito.madteam.net/ckfinder/userfiles/files/64366331091.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/sisudufixiwo.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/jisegorinu.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/33457300544.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/junejen.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/98932224084.pdfIn PDF document text
    • https://monyetjoget.com/contents/files/pidepoxivosoguzelepebet.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fccddcab2f---pexulejibatitakadesekira.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/rizizatenujagatez.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/20972434266.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/82445676335.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/jokatobabunesefenapaxedup.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/31985193240.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/53224959859.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/38f4b71efef98ce7c2017c5960aaf330/94357929848.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/68907033198.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/papemufafebifulera.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/74824487211.pdfIn PDF document text
    • http://espokebar.com/uploads/files/22907943703.pdfIn PDF document text
    • http://sudeoksa.net/userfiles/file/20210910141545.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16144486b2588f---rapobimanew.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/a5a903c285b447b51c4e7d1e91b947b0/83299776818.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/25368902157.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/89412122924.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fef1272005---85392967964.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=house+of+fun+free+coins+2020PDF 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_off0000b3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B2 15596 bytes
SHA-256: aeaaaa4ffa808797910beecd5c4f34d75a12ca0d0d90f1da002ca25ebea0b1a0
font_01_sfnt_off0000dae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 10356 bytes
SHA-256: 31de74991e9843b71d00af63945ca0312574d9d4f98bca7a8341940a5e65d818

Open this report in the interactive analyzer, or submit your own file for analysis.