Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab465989fa762c4b…

MALICIOUS

PDF

87.3 KB Created: 2021-08-23 16:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 25eb0567bea07e282d94cea718360021 SHA-1: 60c43fca45c56415700f4b2a620260643be55bba SHA-256: ab465989fa762c4b3c49b239e21ffb4604e29b15b38dec21a7d31b62d9f6cfeb
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. The presence of numerous URLs, including those with 'utm_term' parameters, suggests an attempt to drive traffic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://chcial.ru/uplcv?utm_term=how+to+get+elytra+wings+in+minecraft PDF link annotation
    • https://deitratech.com/userfiles/file/bofufuzedumomozixigomasuv.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/49304765833.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/kakizigilegituzubuva.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/petefugizegopusikopinigox.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160890d5674e97---34244562507.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/sesumedafuteganero.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021052109111766304.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4a4271fb4---82300538158.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c146bbf38b6---51737432078.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/ganojep.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/75733195660.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/79272033802.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/a7de657890319e7305d647c3f4f4d23f/41644797968.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/c573b91b6e629240b75a6197c7731ab9/83173676283.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/sakufokoraravir.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/c11fcf2957eb3ea63138319f8488fece/wewurawogobemorivaxed.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1612369a753cb1---rabibozudilugub.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/45798209676.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/d38n62ip5bg190a7ftj2uotifn/vakiwuvefufedikubonedelo.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f29c36b6d36---76051365810.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160707fde0da4b---30993551541.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_off0000ee34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 17264 bytes
SHA-256: e8af1550938e249a8603fe1a4e16108cc6342ae5f288d302e20df9ad9ef2d3ff
font_01_sfnt_off00011ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA1 10872 bytes
SHA-256: 8e763d78e4561447fd30a7739bcabc9574469e65cdcba1cd9dc60eb5bdce7041
font_02_sfnt_off000134c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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