Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f2975eb21d462f…

MALICIOUS

PDF

74.6 KB Created: 2021-04-04 18:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d17de2358af3832c8a62e2f0f9709559 SHA-1: b373aedd91c9875af9323fb1502038ce9345d482 SHA-256: 19f2975eb21d462ff4e15586610ed892e072f334ff4880ee737674b1ac445f3e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/award?keyword=advantages+and+disadvantages+of+cluster+random+sampling+pdf PDF link annotation
    • http://raraveluwogevuw.mypressonline.com/solidworks_simulation_assembly_tutorial.pdfIn PDF document text
    • http://50offshop.pro/how_to_use_neckband_bluetooth_headphones8p7at.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/hifjhhj/53671423580.pdfIn PDF document text
    • http://rukozhop-guide.com/sdg_e_matrix_bill_pay5covp.pdfIn PDF document text
    • http://akvatehnika74.ru/naruto_blazing_jp_apk_2._10._1t1506.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/dCA3Dji/samajujago.pdfIn PDF document text
    • http://devivitonewe.sportsontheweb.net/22663304073.pdfIn PDF document text
    • https://cdn.sqhk.co/lukuvekeliki/eeCTih5/setting_up_willful_fitness_tracker.pdfIn PDF document text
    • http://pigalimiru.medianewsonline.com/mandalas_de_caballos_para_colorear.pdfIn PDF document text
    • http://xazapefunel.getenjoyment.net/josenupuwesogal.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/cgeop5u/rumekubemilofozasex.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/bgfcZzd/zaxaxanerunimelorizores.pdfIn PDF document text
    • http://ctuxuu.com/40691329021ktxsq.pdfIn PDF document text
    • http://yewes.fun/namonugofil8mdok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_55451d9d1e0549958407f010cff84966.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a43049-6965-4917-8dd5-ef9192f7d81d/bulelaraxisezululofuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d5f9d7-dca4-4a02-b24f-c3fd3dafdec6/51032014341.pdfIn PDF document text
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_ee8ff99f9bda4bd998ed7e5b9ead0c74.pdf?index=trueIn PDF document text
    • https://089130c0-62ae-4bf1-a93c-656440fe8451.filesusr.com/ugd/738632_6109426de13b4c96a354d83430ef56ca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d564aafc-7329-411f-b916-b4ec8e9cb923/fepidefubegew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2255f20a-05ac-46b3-924f-8f7947c661d8/walmart_hours_today_christmas_eve.pdfIn PDF document text
    • http://satovimowenijor.myartsonline.com/law_dictionary_download_free.pdfIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_6b9a2fca307048df88b00babc170dc3b.pdf?index=trueIn PDF document text
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_f55b39b478b84058a1e2283ea5405650.pdf?index=trueIn 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_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 5524 bytes
SHA-256: e977bdaf3e46ba3c86156f68116f8e86fc49459090f5187f6885d925f074ee87
font_01_sfnt_off0000f7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BA 10680 bytes
SHA-256: e6d1a4a7326ce73e601e2609464003932ddb0834ee37314d7008549b9872e375

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