Malicious PDF — malware analysis report

Static analysis result for SHA-256 789edd8e3e49c602…

MALICIOUS

PDF

76.9 KB Created: 2021-06-12 12:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: dc85c7d61717cc6968d83df49b46a37d SHA-1: 508af3e213d2dcb336daa50a3e3692c83cfec312 SHA-256: 789edd8e3e49c602a88db2c04b86966264fb023998aa6dedd8bdd31d9400a9f4
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, presenting numerous URLs that likely lead to malicious content or further infection vectors. The presence of 'utm_term=toxicwap+movies+download+2020' in one of the URLs suggests a lure related to pirated media, aiming to trick users into downloading malware. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=toxicwap+movies+download+2020 PDF link annotation
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/8d36fedbd4207b9eebe5eb2028fedf88/ragoziwemazeraxab.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/sivuzawuwowijewidusi.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6da125e86---39777706707.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/92319248651.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a04090c513d---jusafigegafoze.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/wojinaken.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/1776c19dc30b4bf982d063ed31bda8bb/96553084612.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/4bdvapihjk1c5f76er6efdedar/79372078575.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/850e7be2e5da2685f6eb4e106065f036/55929983496.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/813de594ca495e8ffbb7d4dd03835185/94303563139.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/jenrn4fhhk1bbpj66k68hi42u9/19269453304.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/60212106612.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/bprj2b5bbrqqt90dlubn1ekfnf/74683401081.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf044b5143---jelosazuvawufabiw.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/36868754138.pdfIn PDF document text
    • http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/rosuxosokogawepojagavew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9B 5568 bytes
SHA-256: afe5653665f793533d138d384caf86bb73fd5e6c25fda886fa267704999f265a
font_01_sfnt_off00010299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10299 10696 bytes
SHA-256: d6deab67473f8372695589b1d67d55a595f68cfcddf52512c38a2b472d7c2b13

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