Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b59068be935fd4d…

MALICIOUS

PDF

82.9 KB Created: 2021-02-26 13:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d7cbf395f94f48585e188c1feeb3bf2f SHA-1: abb33c922dd70309359229b062c07237d5ceeada SHA-256: 7b59068be935fd4d769bf168982eb71659cc4d079241240329054aed8ea65ef5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://kuzutuzo.ru/123?utm_term=what+to+say+to+someone+who+is+stressed+reddit PDF link annotation
    • http://xogunajeraxuda.mywebcommunity.org/complete_list_of_dan_brown_books.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415770/normal_5fe2aa5090e0f.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/dawegigunusewigo.pdfIn PDF document text
    • http://mnogolidov.xyz/screen_recorder_video_recorder_xrecorder_apkpurepm3xj.pdfIn PDF document text
    • https://cdn.sqhk.co/wodigajamu/SS4NfPA/harvard_business_review_books_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405929/normal_60214ff7d337d.pdfIn PDF document text
    • http://pet-guru.shop/jasariv7qt08.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/noraxiteluzazadi.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/savofipemikujeraxajemoba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387816/normal_5ff0e3e5e2ce1.pdfIn PDF document text
    • http://gravkamen.ru/towanexezogoxixufenotogonlupcl.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/fjdiHjf/pesozila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498834/normal_600eaee333dda.pdfIn PDF document text
    • http://baffer-shop.space/55141674533o9huy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabodegodonirad.atwebpages.com/lijudo.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/out_of_sight_out_of_time_quotes.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/guxataveduremuvikux.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/broken_screen_live_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/82229268170.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/46415537249.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_off000107c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C7 5240 bytes
SHA-256: 4bb5100861d843ed0e82297dd407cbe5c2d1e2a3b27cca958d8b5095f273c89a
font_01_sfnt_off00011981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11981 10560 bytes
SHA-256: 241f782f992be8110ad9f47a1ee187e92f11136d64ed34c59878fbe3e76e6135

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