Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb3d904145c8ba82…

MALICIOUS

PDF

75.6 KB Created: 2021-02-18 10:18:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c484fa4da59aa6c361eb50f87abb3df7 SHA-1: 216ba7f12a3f309bda1ad2dcbcc759281b286a12 SHA-256: eb3d904145c8ba820e9f795a17e1c5e5cde48c1bf379cc66cb109932d2173429
126 Risk Score

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 0.9998

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://bologen.ru/strik?utm_term=bmw+e46+manual+transmission+fluid+type PDF link annotation
    • http://marketitaly.info/linksys_ac1200_router_password2ku22.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/d8ggIhe/moneygram_app_send_money.pdfIn PDF document text
    • http://1xbet-registrat.site/sentry_safe_default_code0vj88.pdfIn PDF document text
    • http://xitnet.fun/nuxixud2fac.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/ihghidg/najozamutekugedas.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/Ujfhjjh/rebogat.pdfIn PDF document text
    • http://lishop.site/habanera_cello_sheet_music7dx3z.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/dJhaidS/war_movie_bgm_ringtone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/e7F4mge/37662876314.pdfIn PDF document text
    • https://cdn.sqhk.co/lesepivir/ij9F1pZ/barbie_unicorn_pet_doctor_uk.pdfIn PDF document text
    • http://clientbluebadge.com/kane_chronicles_movie8zj6s.pdfIn PDF document text
    • http://choosenews.space/925727562919d9y3.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/c1Ojbie/gurituwelotaseriziximurul.pdfIn PDF document text
    • http://ogranicbio.space/xudatanogerimulav6engf.pdfIn PDF document text
    • http://garant-ritual.online/43466990209q9lwe.pdfIn PDF document text
    • http://hookup153.space/larakaseteramkntn.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
    • https://s3.amazonaws.com/didowugorokirug/hindu_calculatrice_scientifique_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/dell_poweredge_r710_hardware_owner_s_manual.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_off0000dca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA6 5552 bytes
SHA-256: e4a6d0f19543003d1fc7edf6d3e60c7482fb25231c71a6b3c22ce0f6a0ed2540
font_01_sfnt_off0000ef87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF87 10416 bytes
SHA-256: f579051249abe603b542b3d759d611644713c387bb33797de733cd8a6dd88702
font_02_sfnt_off00011328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11328 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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