Malicious PDF — malware analysis report

Static analysis result for SHA-256 1affc1930edbc98a…

MALICIOUS

PDF

78.3 KB Created: 2021-03-16 10:36:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1c1d92be08e978a3cd3da599cd3ddea5 SHA-1: 6af6c97e9cdf0c7e5423cb26acdf85fe204150c4 SHA-256: 1affc1930edbc98ae642c0454560535b7c3b384a865ded94df6c0640a463a85c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://fokemale.ru/award?keyword=estadisticas+de+alcoholismo+en+mexico+pdf PDF link annotation
    • https://nevuvipegigi.weebly.com/uploads/1/3/4/5/134589722/witirosapa.pdfIn PDF document text
    • https://kujepilam.weebly.com/uploads/1/3/5/3/135343620/zasovowop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445326/normal_5fe33ce8d1c5c.pdfIn PDF document text
    • https://musokuvezuref.weebly.com/uploads/1/3/1/8/131871850/944815.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/79231857649.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/hb8iihd/savings_goal_tracker_bullet_journal.pdfIn PDF document text
    • https://cdn.sqhk.co/ninuxoti/Xgj7gjc/aisi_carbon_steel_grades.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/Thd1pjg/taripuxafozer.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/iak95je/xuvuxuxego.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420907/normal_60090792d76e8.pdfIn PDF document text
    • http://kewatupu.scienceontheweb.net/high_achievers_b1_workbook.pdfIn PDF document text
    • https://cdn.sqhk.co/nejijilo/fhbnlub/used_square_body_truck_parts_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinipaz/geDogAU/51224328655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446494/normal_600e6926768d7.pdfIn PDF document text
    • https://vopemafewiza.weebly.com/uploads/1/3/1/4/131408930/zepixasomir_desulir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabulegewuwal.myartsonline.com/81211495255.pdfIn PDF document text
    • https://18e7ef82-5c75-44fe-ae22-4c356c2c9ce0.filesusr.com/ugd/749e61_3a60ef95cfe24e2e935f20e444edc5a1.pdf?index=trueIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_b5feaa0703d14317b0cabd6ed647fe04.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_off0000f117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF117 5324 bytes
SHA-256: c7d4b73b96ec1b4d42064ee891c66d741dc306c90c2ae1d52babb141e83044c2
font_01_sfnt_off00010318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10318 12096 bytes
SHA-256: 6c23cf254bda8cb8b10729da6552ad43de2ed99b7b1e742f2bad6b979c92fd36

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