Malicious PDF — malware analysis report

Static analysis result for SHA-256 beab5d4802fcb327…

MALICIOUS

PDF

83.9 KB Created: 2021-08-29 10:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f864b333274d545bb075a5d89ae7a3c2 SHA-1: 7f51bc09ab59a19df500a9a1815c5484408b0dde SHA-256: beab5d4802fcb327da2becda20c65bf5402a5d82b4173b2ade4f8ede5b7d21c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URI links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://philabc.ru/uplcv?utm_term=personal+pop3+email PDF link annotation
    • http://premiercontainerlines.com/media/ftp/file/nunevemafatav.pdfIn PDF document text
    • https://roomart.uz/ckfinder/userfiles/files/8092302850.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/9aa2b06fd8f0b4f4af9bbc6e089cbc51/17751129645.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1e04e0f7d---44740230876.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/sasasomed.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb79018dcc---vorosogepivuvaxukun.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/72493454185.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/pofuvitusemefitan.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/bonifulekitetur.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/11329862718.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/81045956905.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe439830a7---56027655288.pdfIn PDF document text
    • http://pooq-design.com/app/webroot/fckfiles/file/bidoxasivitumotewowesukox.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/8c7448be3b1b5573cfd3d47ed614fe18/90063705285.pdfIn PDF document text
    • http://fnathservices.com/upload/file/kojuxonopexenikuwobom.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa5d91f12b---rivarixebezog.pdfIn PDF document text
    • https://taperagi.com/contents//files/ninorupekamapavifu.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ff97ee9f8---bewaxafulefadesomanex.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb3518fda4---90663574924.pdfIn PDF document text
    • http://debden.org/userfiles/file/kuvuwarum.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/hiceuu7j088m9n6p2d097dbuv1/20972311017.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada40f6cce0---nokasajipabolibopedudotu.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_off0000e5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BA 17440 bytes
SHA-256: 268d760d1a445d5e0d4c249514ee098153197f5a194b017ffc41310be77306fd
font_01_sfnt_off00011261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11261 10488 bytes
SHA-256: 0a2efa0b81b5bc9d73a4b82ffebef1d99020ed0b57488178b33dd88495d3f408
font_02_sfnt_off00012a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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