Malicious PDF — malware analysis report

Static analysis result for SHA-256 7419a839c1f77b64…

MALICIOUS

PDF

83.5 KB Created: 2021-08-08 20:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d52a36255615a27397220d0097ebecf9 SHA-1: 386f82d9f3f9b29e9604c5aac5fa14252067d142 SHA-256: 7419a839c1f77b64a9203c7da8abc7fbac17f96c96f19baa44114415b4b6e2e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary function seems to be redirecting users through these links, likely as part of a phishing or malware distribution scheme. No scripts were extracted, but the structure suggests it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://binarbaidrealestate.com/public_html/userfiles/file/xixatukunenujufawepalenu.pdf In PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160791aa3d54a8---48500609410.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/69565158679.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/tuwezonolarefakajewix.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/c4ddcad3b178598f3d046730aab1cf92/wezopifoxirojaji.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/33d36e3c10b078d954b44bac7b052c91/30337825337.pdfIn PDF document text
    • https://shipnhanh247.vn/asset/files/welutovivenifumuduzasaku.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/82630709261.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff3fd746e7---mudika.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeba858b578---87310414021.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/33a4e22b6f114766f3444adbe23446da/golunusoremipovaxipeta.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/lajat.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb5506e136---86983319211.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d2d4a2d0b---fimezarekaju.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/5f5123487142c526d979412f9114fd27/fobadomegonemerupubagu.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e872ba60afd15f1b1466197e8a3e0c83/86793227345.pdfIn PDF document text
    • https://x-software.cz/data/file/nefisagetibab.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/7f40eebedbb753dc4cdc6908fd75825c/pusonivexowaxotam.pdfIn PDF document text
    • http://beateromer.com/bilder/file/95063411875.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609c78d6a1747---9918355375.pdfIn PDF document text
    • http://world-spa-resorts.com/dok/71633023801.pdfIn PDF document text
    • http://hevolta.com/upload/file/83997481754.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/fd896c2b8394481761d71e9f21b67b28/25515402488.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/444ca6f98219f25a1ac26026c1153da3/nawozapeba.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/sefogabobo.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/64fa0a9f0657aba9c2a8dd3b9d58d010/wegelemefogulewe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=gali+gali+mein+phirta+hai+dj+song+download+pagalworldPDF 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_off0000df92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF92 17768 bytes
SHA-256: 9f60c7283bf0e2cc4f7f96b99662cdc064de0ab56062bb873629f4034c72fd80
font_01_sfnt_off00010e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12640 11092 bytes
SHA-256: de74050584fda41b5f0636ed091ed8ef788634fea77c5c453d58b86db86e5d32

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