Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ad20a92d417596…

MALICIOUS

PDF

76.8 KB Created: 2021-04-24 16:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e183c0eb21d8030f9fc7735a6fa52e75 SHA-1: 58b75d38d4ea2b3fa6fc189fec5eb387ea261315 SHA-256: 95ad20a92d4175961df8b849bba1163df5249f6eb5edab29f764cdd14dd2519e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://pelibifir.ru/strik?utm_term=harbor+breeze+santa+ana+remote PDF link annotation
    • http://jozipuvuwuzaj.mywebcommunity.org/html5_download_attribute.pdfIn PDF document text
    • http://segway-wheelchair.ru/realtek_audio_driver_windows_7_hp_pavilion_dv6000qkxvf.pdfIn PDF document text
    • http://noxaduva.mypressonline.com/28050385241.pdfIn PDF document text
    • http://igme.site/samoan_prayer_before_eatingwsme6.pdfIn PDF document text
    • http://islta.fun/73554536162rzhy.pdfIn PDF document text
    • http://fitdieta.com/xujaputusodorjb9d6.pdfIn PDF document text
    • http://goodnatural.space/immanuel_kant_categorical_imperative4xzrd.pdfIn PDF document text
    • http://igbusinessabouthelp.com/xivekijux22n4q.pdfIn PDF document text
    • http://bigmagazin.xyz/scottish_rite_ritual_monitor_and_guidedu5fo.pdfIn PDF document text
    • http://sexesex.site/numerical_ability_questions_and_answersknfa7.pdfIn PDF document text
    • http://apsmall.space/motobagawuziworeloxsyfjj.pdfIn PDF document text
    • http://cardioactiveuficiale.site/dinedulepomodixidafhtzsx.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/f9539396-d679-4bdd-ac5f-235c3252006d/how_to_delete_schedule_on_pentair_easy_touch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c95de9c-859a-4e79-892a-6f0f64163f4a/itil_v3_foundation_certification_cost_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f516240-328c-4823-a174-a536dc85451c/is_screenwriting_a_realistic_career.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51fee255-3e1d-42ad-950d-6fb04efb22d0/datevopewafesim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062bcbb0-8588-4e72-b9e8-fbffb165a06b/52915357442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9159a3b-acfb-406a-97a8-93083efc8e0c/vewuxen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba5dbf72-bbd2-467c-a588-ade752bd3fa8/the_crown_margaret_thatcher_daughter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1923694d-0d34-4221-8f5a-014d3860534c/86861105784.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_off0000ee1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 4952 bytes
SHA-256: c6e8e7e126fdb7eceba20d33957d60881c1edf0b5a293a878adcc92af851c768
font_01_sfnt_off0000feda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDA 11440 bytes
SHA-256: 57f556dd36d9f77d6c79e20dab7881ef821f9e79f408e7044981aa9c66de4ff3

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