Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca64f798c548c26…

MALICIOUS

PDF

83.7 KB Created: 2021-02-27 03:24:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 33767789318432d10804111e3264e45a SHA-1: 24728846b6dba9b29479fa5741cd04f204a0e4fc SHA-256: 4ca64f798c548c264d801066fa40cc912cc96998d9d6bb12f48b3bd4288f3a99
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing lure. The PDF structure and heuristic firings indicate it's designed to redirect users to external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/strik?utm_term=ezdrummer+2+manuale+italiano PDF link annotation
    • http://fosipuzo.mypressonline.com/hegelian_dialectic_politics.pdfIn PDF document text
    • http://domastmsk.space/pc_building_simulator_pro_apkczy9d.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/84448579167.pdfIn PDF document text
    • http://devicesprotectionforusers.site/zibojiwusekufeiqinx.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/69753378337.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/how_to_score_motivation_assessment_scale.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/85707365716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446286/normal_5fe8a8bb0c0b1.pdfIn PDF document text
    • http://nomevufaneboja.mypressonline.com/best_romance_books_2020.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/robin_hood_prince_of_thieves_love_quotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489045/normal_60338de2d2134.pdfIn PDF document text
    • http://characduwe.space/pozurazimukusosabawene72k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_6009b77c90846.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/5e_monster_template_word.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468554/normal_5ff7aa24a60c6.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/blue_yeti_usb_microphone_review_linux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487413/normal_601843faa8d3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451941/normal_600bcb8e7c032.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zepizevut.atwebpages.com/wopivojolukidakej.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/97746454452.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C5 2856 bytes
SHA-256: 2cdd336d4ad4698270d9077a3b8ade5aca6d4decd0916d5d918882b18b5a1806
font_01_sfnt_off000100f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F0 4932 bytes
SHA-256: 5365654b37a1e7a9bd5bb1de61c2aacd3fcd0b55af4b3cd39ff85ef0b2c072b6
font_02_sfnt_off000111a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A3 15216 bytes
SHA-256: 3532df4783320165fd8585e8b85a6f0d9b46a972c606b0a7f9f589fc0c3b4bd1

Open this report in the interactive analyzer, or submit your own file for analysis.