Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ea182864b32ecc…

MALICIOUS

PDF

72.5 KB Created: 2021-09-01 23:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 111a46cfc332cca09840e137b2e4bfe3 SHA-1: d0228badd82ffec9c478857209f275a2542f81ad SHA-256: e5ea182864b32eccb4b7c1f47669cd2a493189fa915839a2627fcd6fa4900e60
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate the document functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These links are likely intended to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://medvor.ru/uplcv?utm_term=the+eyre+peninsula PDF link annotation
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16080d32b68fad---revad.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/94488601655.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/5hjp1iu31loqrbmptdlalsbre7/kumejuzalixet.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/a7bd0b3ba00c5852c5e4baaae1e3028b/jazikoni.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083b61e9376e---pafopowot.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/5msohibc4cq7ufjuaibb8sg3r0/vudizev.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd9acdbb9d---85391260921.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f9a1d14da---nifavuzuwikos.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/9f10af4a3e568816c76370faea7dfd8f/84159288695.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/jixuxakideso.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/684c8a3a14aa0e513f8be304527c020f/xeponizaxanatitukumarox.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/mokasovol.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/taxax.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/85056432490.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/29811124945.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1611007c63582a---bonovowasowumuji.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/76877985394.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/mamululewujegagaw.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/bj18ef24qm3p0ue8bkvli5c54d/14709637451.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a4e4822d0---jupoguxajiwoxomi.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/50cad497a079f0993295466f60aa8977/56641663189.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/latutezu.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_off0000b9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9BA 16864 bytes
SHA-256: b0ac5e6688517c789874c3fa0aeb1552cd125791988fb8ec586fc3cf4eba78f3
font_01_sfnt_off0000e4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFE 10308 bytes
SHA-256: 5d06bb129c937010fa753193b944d6bd0854010803bf07a9bc0883348c9650f8

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