Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b8a8fe3f4012e6…

MALICIOUS

PDF

76.8 KB Created: 2021-03-17 15:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 766769a554dbd800fbf6bcb8905db4fb SHA-1: d8cb7e8fbc1ff2feb8223b56293b8eb53774c66f SHA-256: b9b8a8fe3f4012e6463ec35cea0369a991c46b70e878d4eeb2609357f0ba7c20
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 0.9960

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://druttle.ru/123?utm_term=swagger+documentation+generator+pdf PDF link annotation
    • http://womovenum.sportsontheweb.net/1_bedroom_house_plans_free_download.pdfIn PDF document text
    • http://sofebitaxed.iblogger.org/carranza_periodoncia_clinica.pdfIn PDF document text
    • https://cdn.sqhk.co/guvelebul/7ygh4oY/hallmark_storytime_snowman_2019.pdfIn PDF document text
    • http://wimebenese.getenjoyment.net/pefev.pdfIn PDF document text
    • http://bonifacy.site/kupameral2ctp.pdfIn PDF document text
    • http://hellesypakk.online/15249868893pvvl3.pdfIn PDF document text
    • http://wifisef.medianewsonline.com/99054110477.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/1iKhgif/logo_quiz_2020_answers_level_5.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/why_is_my_altec_lansing_speaker_not_connecting.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/jsia6ts/the_sims_freeplay_mod_apk_for_pc.pdfIn PDF document text
    • http://allieshouseofhope.com/gafapixogevusapukegimenemj3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/770458e2-6d6d-47a3-8844-413d1cad6b06/kilubiduboteributavemi.pdfIn PDF document text
    • http://wagewatudol.rf.gd/breakfast_at_tiffanys_streaming_eng_sub.pdfIn PDF document text
    • http://fezurerejexi.rf.gd/taming_ofthe_shrew_quotes_sun_and_moon.pdfIn PDF document text
    • http://jugofave.rf.gd/children_s_choir_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/534607db-d52b-41af-9905-efc4b84a07ab/kenuwetiboxiwip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e767d9ce-d6dd-4fee-a8ac-b71e19d670d2/gewiwudogurifew.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/elkay_drinking_fountain_repair_service.pdfIn PDF document text
    • http://namanowadofa.rf.gd/xaxobajepom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e53b0f8-472f-48fb-ab97-ea29ee40a340/tilijaporalolasebigivim.pdfIn PDF document text
    • http://labapok.rf.gd/lizamuvemaman.pdfIn PDF document text
    • http://setukodabirez.epizy.com/9092587536.pdfIn PDF document text
    • http://kajufikuxididon.rf.gd/asctime_format_python.pdfIn PDF document text
    • http://kapizepaninufo.epizy.com/simple_uniform_hashing_search_complexity.pdfIn PDF document text
    • http://daforewepon.epizy.com/what_ended_the_renaissance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b95bde9-b2a3-479f-9ed0-6e8e2271ef21/bafikumanebuz.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_off0000ee13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE13 5460 bytes
SHA-256: 75a5e787f902e33b50260f1d649fc13f96f7a8a925226f35a8212bcb50ac18af
font_01_sfnt_off000100a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A5 10200 bytes
SHA-256: 73feb9af59a8e7dd44fefcecc50bbafbd9611c388e91e2900f305f9c1ca540dd

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