Malicious PDF — malware analysis report

Static analysis result for SHA-256 2415e258648e786d…

MALICIOUS

PDF

80.2 KB Created: 2021-03-14 16:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 22c8d4ba0a85f03c3bf4ba029ee8f7ac SHA-1: bf940c57a37d1888d9e41a10fa7471d0ccb6c60b SHA-256: 2415e258648e786d13906fae5e2d1fc2f5f41b719177c818c22084cb31187a97
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains a large number of embedded URLs, many pointing to disposable hosting or link farms, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the 'link farm' heuristic strongly indicate a malicious intent to drive traffic 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://botokaw.ru/strik?utm_term=duraflame+space+heater+lowes PDF link annotation
    • https://vupixesit.weebly.com/uploads/1/3/2/7/132740805/mupisul-barur-sisaja.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/gadim.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/8QDjbgj/the_walking_dead_michonne_finds_rick.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/TwgghR9/guess_the_emoji_movie_answers_level_19.pdfIn PDF document text
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/bolumu.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/canon_pixma_mx432_printer_cartridge.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/vutakogeximufotag.pdfIn PDF document text
    • https://taxikifa.weebly.com/uploads/1/3/4/4/134496463/fududezov_pusufofozudiw.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/wruQgjU/21201022823.pdfIn PDF document text
    • http://kirudikegopoded.sportsontheweb.net/basic_concepts_and_principles_of_economics.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/honda_gx340_shop_manual.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/how_to_get_nfl_sunday_ticket_for_free_on_roku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zelawiture.epizy.com/82665142229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/739fe71e-6d82-4ff6-a19b-29c3251a1518/22401697838.pdfIn PDF document text
    • http://fujesotes.epizy.com/85613366975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f86f8e-e965-44eb-91a5-7c9641e69d76/61650741138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc9b6df6-3767-4955-97a9-ad9f8ff4a520/28415045538.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_off0000facb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACB 5348 bytes
SHA-256: 4ec4f7e42f4158c7090b557ec7e707a613ba5bad9f2ff48ae4e4c5a35e82c6a9
font_01_sfnt_off00010ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE7 10848 bytes
SHA-256: 3670846c3b854816e065163435ee4e99c6364cad103131a08944ffe442e8ef45

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