Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c862b08cdefd4f…

MALICIOUS

PDF

77.4 KB Created: 2021-09-07 23:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d7c913c5b3efb260a6aae7f85ee2c172 SHA-1: fde315ad89a9721d69f9fe40a961ab51a31eb45c SHA-256: 47c862b08cdefd4f1bfe4dd08ff81551ccfde99da5fe4f4b5f91550975c49902
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external URIs, many pointing to compromised WordPress installations and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. Although no scripts were extracted, the presence of embedded URIs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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=ingenieria+mecanica+campo+laboral+pdf PDF link annotation
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/faf6feca1ed97584b0d8b6e485f817cc/57576945300.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088357dabf31---zoforatasi.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/1ec2d6de672ce028d2bfc8d88605667f/kazowudafaramasedi.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/29483598937.pdfIn PDF document text
    • http://beiks.info/public/file/rowuriteburamifuxonunoxax.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/kipumemiwiguni.pdfIn PDF document text
    • https://rosycaffe.com/file/jegapofumidifof.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/lilimipimamepowenigu.pdfIn PDF document text
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/zagegetujisabepunesesimiv.pdfIn PDF document text
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/92083907583.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/alnomiduc34lu6vp1rbdk5esjh/3166357433.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/tudiwamogep.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/8a3956306f835489bf82a011a0539289/guramibuzukuzegik.pdfIn PDF document text
    • http://tt-ural.su/admin/ckfinder/userfiles/files/jobag.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/kakifaxinaweje.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/nufasirubeli.pdfIn PDF document text
    • http://fpempresa.cen.es/userfiles/files/58514136046.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf608da5ef---pedufikisotukotegosikeko.pdfIn PDF document text
    • http://gillyard-johnson-mahoney.com/clients/62114/File/savuvelejumafonovaxobevo.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/alqopuqc83ktkjso7ui4o3j6dk/tuligikezosituvawipaxax.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/91739541923.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/xugazududowemetevugevapu.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0298e8454---17729227044.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/709c3df841dae33525de236f64d696cc/75714017338.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_off0000cc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE420 17504 bytes
SHA-256: 54c35d627066c0999d29954501d066e7f8c58e5dd75b10c59f0683a52e017563
font_02_sfnt_off00010ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF2 10788 bytes
SHA-256: 06fd50da26454be91ef4399f07a8dda393db319a50e0b697ba7ef8281b318ffb

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