Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68e523e82f0243c…

MALICIOUS

PDF

65.4 KB Created: 2021-02-28 13:26:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c8bd890613f3c13830f03ab23b94c816 SHA-1: 3cd9c944452150d6998a363eedbe093337996e7b SHA-256: e68e523e82f0243c4cc15e72aa3115af2c5042dee1674927731091c698b97f28
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-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://vilenefex.ru/123?utm_term=arris+sb6141+lights+meaning PDF link annotation
    • https://cdn.sqhk.co/vuluzazogur/teif8gc/marvel_future_fight_wiki_epic_quest.pdfIn PDF document text
    • http://desokore.medianewsonline.com/fuxaxogijolutejexan.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/X6hhhe8/personalized_license_plate_check_california.pdfIn PDF document text
    • http://cloudmarket.website/gusukamukajx1rju.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/yhg60jf/dowuvexusezani.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/iijjagg/playing_card_deck_display_case.pdfIn PDF document text
    • http://fortuneo-enligne.com/409007103125f3k6.pdfIn PDF document text
    • http://kfcrabota.ru/682240351656xcx.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/will_there_be_a_new_harry_potter_movie.pdfIn PDF document text
    • http://fesetinidu.iblogger.org/forty_rules_of_love_book_cover.pdfIn PDF document text
    • http://fibutogu.mywebcommunity.org/novojido.pdfIn PDF document text
    • http://rigipufefe.iblogger.org/xokuwoxedimu.pdfIn PDF document text
    • http://merikasavotenum.iblogger.org/world_economic_forum_africa_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/cannibals_with_forks_free.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/apnea_del_sueo_tratamiento.pdfIn PDF document text
    • http://bafuwujix.atwebpages.com/94751065222.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_off0000c32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32D 5520 bytes
SHA-256: 93516722aeb04f014c3eb269106956be819987d5b949e2a5b6930b372f83d61e
font_01_sfnt_off0000d5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D5 10388 bytes
SHA-256: d286ab848d59ea495d211309813728ebb1768af813a6928736e4fbd9b833f91d

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