Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49786932664a585…

MALICIOUS

PDF

80.0 KB Created: 2021-09-10 06:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9b1247b11fb02834141db810c7656cda SHA-1: 4ac6291f57323ee3ec66e83610d3566b7ef5aaa3 SHA-256: b49786932664a585c025fd780c416d0746a68f25a9274a213818726b8767684c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16136d60f3bb12---nilewu.pdf In PDF document text
    • http://tencanpowder.com/d/files/wefogidumufunomeb.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/kopogumi.pdfIn PDF document text
    • http://iccjsc.vn/images/uploads/files/76772181748.pdfIn PDF document text
    • http://flomojapan.com/upload/files/31620369525.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/boxujowerofi.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/nulajufe.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/wemotuwojewoxog.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/71030024368.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/87036478766.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/runofetu.pdfIn PDF document text
    • http://www.dgtrans.co.th/login/ckfinder/userfiles/files/katedosejowo.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/3dc8dea9257cf273421a3d61c57538f0/26941933687.pdfIn PDF document text
    • http://omni-links.com/images/blog/file/xitesano.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/22252893798.pdfIn PDF document text
    • http://donghotam.com/luutru/files/ledewazo.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/junosivepemal.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/vubixananowizudisewamila.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613424ca9a5db---75143185472.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132a25d03e7b---83545778909.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/44522768113.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/kabipomuvibedolanimeto.pdfIn PDF document text
    • http://videlec.be/ressource/file/xerarutibezom.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/48553076102.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/faranixomuwefazojotel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=deadwave+app+apk+free+downloadPDF 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_off0000d6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 17084 bytes
SHA-256: 2954daca02a7989b7cbca4046603a985fec63464a07499d4addd6ceec7f9c2fb
font_02_sfnt_off00011a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9D 10376 bytes
SHA-256: d5979e4afef2a319f94e3d1c7abd33e8dfd501754782fa9a1c97e66096aea129