Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f67cb913f2cc8d…

MALICIOUS

PDF

73.1 KB Created: 2021-03-17 20:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2d6a26c5c999d93e38108f8b72b2e2ab SHA-1: e0c75da9355bfabd5fe03f58609b94f1b71f9301 SHA-256: 36f67cb913f2cc8d64bc43093b0c409e0fed5b1a087bb0a9aefcc1440b24db16
186 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. It functions as a link farm, directing users to numerous external URLs, one of which is `https://seumenha.ru/wix?keyword=kentucky+driver+manual+audio`. The document's structure and the presence of many external links suggest it is designed to drive traffic to potentially malicious or phishing sites, masquerading as relevant content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=kentucky+driver+manual+audio PDF link annotation
    • https://digeforoxega.weebly.com/uploads/1/3/4/6/134668277/gaweramigetolo.pdfIn PDF document text
    • https://vifejekim.weebly.com/uploads/1/3/5/3/135322606/pidisixi_buzujudagulu_romezozunef_soligusasox.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/60554598372.pdfIn PDF document text
    • https://gumewixolasadaz.weebly.com/uploads/1/3/4/6/134659592/b2c5c21fc1.pdfIn PDF document text
    • https://kefavobora.weebly.com/uploads/1/3/6/0/136010588/gomufupule.pdfIn PDF document text
    • http://rotixumuzu.22web.org/ramutasisijupokidigeteka.pdfIn PDF document text
    • https://zijobukevas.weebly.com/uploads/1/3/1/4/131454580/xozaxekigemegobid.pdfIn PDF document text
    • https://silatasetexa.weebly.com/uploads/1/3/1/6/131637876/wafulo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c29c48-d9fb-40a6-9d6a-ce869126febf/22148933532.pdfIn PDF document text
    • http://dekibej.epizy.com/android_app_development_tutorials_point.pdfIn PDF document text
    • http://zusaxadixuxot.myartsonline.com/thule_bike_rack_strap_failure.pdfIn PDF document text
    • http://dobigovoba.rf.gd/30763726603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8ec2f5-e12a-42f1-bca1-d1b2f9c7e899/art_models_10_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cacc79b8-d466-4e7b-8ec0-13a382a09c54/30415630642.pdfIn PDF document text
    • http://telimivakapot.epizy.com/vemige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d430b1-7e24-4c28-8f3c-bf78bcd077a2/31805788676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3440963e-89ea-41cc-9982-149dd05b1dc3/the_mysterious_benedict_society_plot_diagram.pdfIn PDF document text
    • http://xubixetumed.rf.gd/528856074.pdfIn PDF document text
    • http://mibofive.epizy.com/sony_vegas_pro_13_templates_free.pdfIn PDF document text
    • http://wororezijetixa.atwebpages.com/is_the_serenity_prayer_found_in_the_bible.pdfIn PDF document text
    • http://baperosuvo.rf.gd/lutudude.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B8 5100 bytes
SHA-256: d96ea29423b4b3e4885a9f8c72cf7ebf6e4b4d81cb1b57792d6395066bdae59e
font_01_sfnt_off0000f206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF206 10788 bytes
SHA-256: a39f3244549961489b7160a7289cef29c9b718d516db835c86d7d0f7a48cac21

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