Malicious PDF — malware analysis report

Static analysis result for SHA-256 8345d60b85485926…

MALICIOUS

PDF

77.5 KB Created: 2021-03-10 21:32:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 53bbaf616d70cfc5f5614b43751f4375 SHA-1: ccff7037bc8cdc6d2719ba608d3592728feafb39 SHA-256: 8345d60b854859261896de13a32699535973eccffd0d1d59067750ca2ca78db3
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 0.9991

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://xezojetit.ru/award?keyword=bwv+106+pdf PDF link annotation
    • https://cdn.sqhk.co/vodadavubex/icjiYjh/62049036741.pdfIn PDF document text
    • http://legrand-spb.ru/xiwofewefeglugik.pdfIn PDF document text
    • http://esagafow.fun/42131675747t0l7g.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/6jb0lji/26533885161.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/dcphjge/pianista_switch_update.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/el_libro_secreto_de_daniel_torres_resumenyo3o7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454543/normal_5feb9ee2aa480.pdfIn PDF document text
    • http://ejqy.com/72399311668wzeqn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494677/normal_6015125a6c786.pdfIn PDF document text
    • http://noksipals.online/zombie_usa_2_mod_apkobmxu.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/ihiPjdv/yaad_aayenge_school_days_song_lyrics.pdfIn PDF document text
    • http://scoretdho.best/what_kind_of_oil_do_i_put_in_my_husqvarna_lawn_mowerk6d0v.pdfIn PDF document text
    • http://ogranicbio.fun/lebezoxedipuxilijgg9z.pdfIn PDF document text
    • http://hookup671.site/premiere_pro_overlay_effects_free_downloadsb3ds.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/jdLjhsD/kung_fu_panda_3_characters_kai.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407664/normal_6011c2ac7d489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_60468580a2c4e.pdfIn PDF document text
    • http://wildber.store/88926396230fu8u6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zisubaripuxiba.epizy.com/set_border_radius_in_android.pdfIn PDF document text
    • http://faxanudof.epizy.com/96214705934.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_ca8414c507fb4475a7e0cd0c07df1176.pdf?index=trueIn PDF document text
    • http://zaniwogi.rf.gd/89001383997.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_6a7f442fc6734f269f7f2c7c7a4d035d.pdf?index=trueIn PDF document text
    • http://vobuxex.epizy.com/16304175608.pdfIn PDF document text
    • https://bfb79b04-db4d-4c54-a74a-4733ff68ceb9.filesusr.com/ugd/11291b_bf1813cbd25b46f0b2e789dadc2148df.pdf?index=trueIn 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_off0000f45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45D 5068 bytes
SHA-256: 43a69ec35850b42b3b59c5f174da5428d715eb9ef079f4584b84cf7eb5edfcdc
font_01_sfnt_off000105e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E0 10288 bytes
SHA-256: 2ae1557bfd5205a9a060b181250db69f1d34397bb70631d51da0e902fedabbc5

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