Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3bc2d91cd7793b9…

MALICIOUS

PDF

101.7 KB Created: 2021-07-04 06:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1492487028c013533ee622053b62e93c SHA-1: 7df9768cfe01eb6a2258c2f4fd8a78a0bf432288 SHA-256: e3bc2d91cd7793b96b7c093bab6f686ec7f148765c194535b81aed2b1b063fae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm intended to redirect users. The presence of external URIs and link farms indicates an attempt to lead users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://irlanc.ru/uplcv?utm_term=colchester+student+1800+lathe+manual+pdf PDF link annotation
    • https://himalayanthailand.com/image/upload/File/47872206600.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/aa1eb541afcdceae00c7092339de67ae/xipixoxonoxubuvopixageri.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/iovungodoil30h3ej5toa77mn3/42756243932.pdfIn PDF document text
    • http://dogable.de/userfiles/file/67856549521.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf8fbdc987---69794660756.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbca78b3d5---14284244078.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/zopevaraperam.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/48638682837.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e86d0931f---54779953183.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/m647isafaq62tfujp2ijpt4n82/61095188347.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a339396d045---noxutuxugijalogepivozob.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094753c9babf---56079631774.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/v85fuip55205p77b5qddt1pkst/naxetanuvuwadifapawage.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/3d99e9ca9fcf2eac03acde915642981c/gumopafikaritexixuzidubos.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/ffe4784cbf6ad063953b5f11f13fc459/xezozanurojakakutedimudiz.pdfIn PDF document text
    • https://senhewood.com/d/files/zivigagelusenodifisulofa.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e2d49d464---bejifafepo.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993cd07078f---58384839163.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f771e61ea3---97299808266.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/kalodevivevulenufolemowi.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747d60d3940---tufarag.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_off00012b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14345 11304 bytes
SHA-256: c664bf37552226df2fea2282ae7e72fa6e5636f7518e8625fb33719448b67699
font_02_sfnt_off00015db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DB7 16984 bytes
SHA-256: 30af4f9e4c3ffeb9e9ba20cacf5b331e2a3b59c04384e9f6b3390655913b7ec7

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