Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9466e91e0f9af37…

MALICIOUS

PDF

80.5 KB Created: 2021-03-01 02:18:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f3304a9132f7a3f9b06861caca8c1453 SHA-1: d21df086eb68463e67135e10fa7e777bb115ac1c SHA-256: c9466e91e0f9af37d6b23334cfd2e795ecc40b91cedd759036512f5e292a37ba
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The document contains numerous embedded URLs, many pointing to disposable hosting and link farms, suggesting a phishing or malware distribution attempt. The presence of external URIs and the link farm heuristic indicate an effort to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=how+to+use+margherita+2000+washing+machine PDF link annotation
    • https://zipakodexosif.weebly.com/uploads/1/3/5/3/135344546/725afe705cf88c9.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/how_to_record_a_sales_on_account_in_quickbooks_online.pdfIn PDF document text
    • https://faxakitowe.weebly.com/uploads/1/3/1/4/131437357/a23bc87896a.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/25586895072.pdfIn PDF document text
    • https://vuminuzatadabem.weebly.com/uploads/1/3/4/3/134311796/6e32c805d87.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/61248.pdfIn PDF document text
    • http://trikotoria.ru/sedasaxalatodejumoniliroda6gin.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/how_to_see_my_rental_history_report.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/hwwkK6y/warzone_2100_cheats_aktivieren.pdfIn PDF document text
    • http://vseti.life/ao_smith_promax_water_heatermd18j.pdfIn PDF document text
    • http://datab.vip/vapojamebogimowx86kr.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/jotomazek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://luvabokinoleg.onlinewebshop.net/the_road_less_traveled_ebook.pdfIn PDF document text
    • http://zuvuzevo.atwebpages.com/rorekerebojekeden.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/food_safety_net_services_phoenix_az.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/big_ideas_math_algebra_1._3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/wojitoveruxagorofefig.pdfIn PDF document text
    • http://xipanizi.myartsonline.com/how_to_open_system_preferences_on_chromebook.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_off0000ef08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF08 5388 bytes
SHA-256: 8162dec4f2912cd5b0f3e2a6465cacfebbbdd01cb3dc4d11eb51879f6d57a407
font_01_sfnt_off00010143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10143 10876 bytes
SHA-256: a3935ca71c31a3516582e14a88397c4f901d4a2ce452c540a4f738246e983e86
font_02_sfnt_off0001264a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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