Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b20fc252f81e96a…

MALICIOUS

PDF

81.1 KB Created: 2021-03-20 17:54:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bf4bca36e2fdbb32d7e9a7272100853b SHA-1: 20536dd3c270bcdb1e3809df39836b6dd1775e4f SHA-256: 5b20fc252f81e96ad7de1c3f7242ea21b39b938669219bc81c6bd1df6c9eb1dd
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://pelibifir.ru/award?keyword=caderno+de+caligrafia+numeros+para+imprimir+pdf PDF link annotation
    • https://cdn.sqhk.co/jesupasuzoku/oxDgf3L/fubaboropukuzugadibonuzo.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/geCgew0/ncaa_basketball_free_throw_line_distance.pdfIn PDF document text
    • https://cdn.sqhk.co/sowodopevew/ggjhDcS/skin_for_among_us_wallpaper_aesthetic.pdfIn PDF document text
    • http://kovagalu.22web.org/42654235049.pdfIn PDF document text
    • https://cdn.sqhk.co/rokatodupi/jj5ifdD/english_vocabulary_with_meaning.pdfIn PDF document text
    • http://littlenat.space/que_es_bosquejo_biblicoeuo9p.pdfIn PDF document text
    • https://cdn.sqhk.co/pamomusemida/KIvgf9e/5964406863.pdfIn PDF document text
    • http://biomaniix.website/home_recording_for_musicians_for_dummies_download1jwfy.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/27815322703.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/roku_streaming_stick_plus_remote_wont_pair.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/5jh2qjj/dopaxorupemisofowinini.pdfIn PDF document text
    • https://cdn.sqhk.co/zitedefew/fCiaIgc/banner_saga_2_chapter_8_walkthrough.pdfIn PDF document text
    • http://mareson.getenjoyment.net/jejosuxinakewofilo.pdfIn PDF document text
    • https://cdn.sqhk.co/vawikepaf/hdgeIZA/siren_head_scary_horror_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zedebegeku.myartsonline.com/88873751933.pdfIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/what_happens_when_you_exercise_for_30_minutes.pdfIn PDF document text
    • http://vulitogegitutop.rf.gd/bhutanese_song_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7A 5300 bytes
SHA-256: 44b4c417d84a332f4fe12992f3687e68480bb1fe38a6ec41944ec6ed341a8042
font_01_sfnt_off00010063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10063 12288 bytes
SHA-256: 8a5b115acbbdce1715c9e315a27e5837fdefafd3bd3590b8654b53ad8f3e6df6
font_02_sfnt_off000126d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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