Malicious PDF — malware analysis report

Static analysis result for SHA-256 851ac21aaf850737…

MALICIOUS

PDF

73.0 KB Created: 2021-03-12 04:56:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0378f4afb9c9d64515f4a4325590f0ce SHA-1: d61ffecccf6023013d5b83f1c216141315337402 SHA-256: 851ac21aaf8507371512f3e1916c0aa6d1be7222b489b680658a7c9e98d6ab22
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 0.9991

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://baarspo.ru/award?keyword=automation+studio+6.+0+tutorial+pdf PDF link annotation
    • http://barashik.space/vutabhv2zg.pdfIn PDF document text
    • http://joteruzawareba.iblogger.org/verbes_irrguliers_anglais_traduction_francais.pdfIn PDF document text
    • https://cdn.sqhk.co/vajirasavuz/bCrgg8E/black_magic_trick_revealed.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/5geDP4n/latest_supercars_calendar_2020.pdfIn PDF document text
    • http://lnstagramverifycentre.com/homer_iliad_book_18pu191.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/el_conde_de_montecristo_pelicula_completa_espaol_latino_hd_descargar2u6wd.pdfIn PDF document text
    • https://cdn.sqhk.co/zavipudajose/iN9Ohaj/95656650786.pdfIn PDF document text
    • http://trylait.club/temadagi51412.pdfIn PDF document text
    • https://cdn.sqhk.co/pipugisoveku/iiigdii/bushnell_rangefinder_manuals.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/iHBRHRv/free_web_maker_software.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/hffxeid/piliwowoxofidapar.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/cAehasR/buvolepab.pdfIn PDF document text
    • https://cdn.sqhk.co/meduxemij/ijsieSh/clubhouse_invite_code.pdfIn PDF document text
    • http://ver-alex.website/what_size_tires_come_on_a_2007_chevy_impalaateke.pdfIn PDF document text
    • https://cdn.sqhk.co/fowifabibu/g70gcaE/gravity_bong_vs_bowl.pdfIn PDF document text
    • http://yandex-dostav.ru/aarambam_movie_ringtonesrhdn5.pdfIn PDF document text
    • http://vigastlens.xyz/versatile_sew_in_meaningu8da6.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/j5eBJev/century_arms_canik_tp9sf.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/bagisi/algebraic_identities_list.pdfIn PDF document text
    • http://maviwapas.epizy.com/52579249545.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/nibulalavume.pdfIn PDF document text
    • http://gisipevuzugofij.epizy.com/jivifokaloroxeru.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/ribujowegorexe.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/vupulasubufoteme.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/suvanonero.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE190 5504 bytes
SHA-256: 883ce5c53a3d3a9791b1c0f91269f1423ea9214119da77b4eeb685763a3de186
font_01_sfnt_off0000f42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42E 10040 bytes
SHA-256: 98c19afab54367ab63901828a8ecc1804a1159369cbdf304a4fa49b272c34a95

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