Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02d88e4c0be3089…

MALICIOUS

PDF

278.9 KB Created: 2021-06-27 08:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9e340b41272128662beb6b4799d9534a SHA-1: fe7f6e3952677853bb2355dd913f483ce0e5babf SHA-256: b02d88e4c0be30893a51238eec84a303d1569943af2f9439fcdeb116d9409fac
126 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9766

Heuristics 5

  • 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.
  • 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 http://willbramephotography.com/15244891910.pdf In PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86f469f58f---vekezutevumetenazer.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c26029d05---lozuxila.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/1673552787.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/52887570981.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/c4138cbb94652c46bda75f7ee588cac2/92011726953.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/ueostjk3qvm5h4ihlastg52css/fagukevuvefufoza.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607db8e781768---54373164041.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770f550253f---85696489836.pdfIn PDF document text
    • http://bi-acaovo.com/upload/files/sawuketadegutilizu.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160762b77def8a---jogavenawekixegatojuxunen.pdfIn PDF document text
    • https://abeess.com/userfiles/file/91474789101.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/m0i6obkcqr5envieui2vn1rg6o/bomugomijepudifena.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/rugotefi.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/7vprdl2d7srolmoqpbj8fuj8n5/96445065804.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/badomawisapupawip.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/1h6ogmbeinn8mp5qs52cavv160/kewuwul.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/62qe4qt2iosl9qpk84ph8vjj0j/gifok.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/99412498399.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/subeba.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebdd7b75c4---zixivalukopusuji.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160723926f1113---86397427539.pdfIn PDF document text
    • http://www.siposferenc.hu/html/livagavatebuji.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/97632806380.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160914bb28a5bc---69874685497.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=hermione+harry+potter+1PDF 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_off0003ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3ED82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00040594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40594 18268 bytes
SHA-256: 61f451551cee735f231d7d05b99d459ebcf7bd3a1bfd80a8743c2729ee1e7b77
font_02_sfnt_off00043593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43593 10460 bytes
SHA-256: 002ff7d4749eceffb19234221c9a9e7181772199b0a8a84c4b123f39d94592e0

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