Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf6e8d22cf58802…

MALICIOUS

PDF

81.0 KB Created: 2021-03-23 19:23:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ab53d578240b28e5ec801867a389c87e SHA-1: 5da32621fce2139dd9b9beebaa772769f9f8f6ca SHA-256: ebf6e8d22cf58802a1286457e88d8042cff67ea84a4fc7c30b8409f1c72d7c6b
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 0.9993

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://kuzutuzo.ru/strik?utm_term=analyzing+baseball+data+with+r+blog PDF link annotation
    • http://winoraama.fun/27397971953835dw.pdfIn PDF document text
    • http://dajobod.getenjoyment.net/luvelizuxolufu.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/how_old_are_the_characters_in_dork_diaries.pdfIn PDF document text
    • https://gidaletibom.weebly.com/uploads/1/3/4/8/134881461/9335408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414672/normal_605016b6dd20b.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/nilitiperipuzifob.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/41661882478rjnhs.pdfIn PDF document text
    • http://letnesil.xyz/79727356520ayti0.pdfIn PDF document text
    • http://pupezawat.scienceontheweb.net/mogonedudixividemesa.pdfIn PDF document text
    • http://jiwimejikigigu.mywebcommunity.org/totiluxuzunokupifi.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/sujet_brevet_physique_chimie_2020_pondichery.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/d25845e950a.pdfIn PDF document text
    • http://card2card-perevod24.site/21608565938fvx85.pdfIn PDF document text
    • https://tesutubesonazi.weebly.com/uploads/1/3/4/6/134682982/bafife.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473047/normal_5ff5eb0074f01.pdfIn PDF document text
    • http://zeruxejobimal.mywebcommunity.org/what_yoga_poses_are_good_for_lower_back_pain.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_602356115f4e8.pdfIn PDF document text
    • http://desokore.medianewsonline.com/multivariate_normal_distribution_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_5fd2c002c2662.pdfIn PDF document text
    • http://kigadotezolesun.mypressonline.com/3139249720.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/dupidopafurexido.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligoroxenafof.atwebpages.com/mhw_leshen_quest_guide.pdfIn PDF document text
    • http://novogizeboje.myartsonline.com/why_is_the_dryer_not_drying.pdfIn PDF document text
    • http://firiwigisu.atwebpages.com/zowutesozegaguzorilarabo.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_off0000fdbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBD 5460 bytes
SHA-256: c43e7b257bce5485a5d817ea1ef2e636104b438114f6981274ad8ed934f2355f
font_01_sfnt_off00011068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11068 11260 bytes
SHA-256: f7beb72297b9b3761664238e0cf78f96ce2d0355812137d5d016ff511c229331

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