Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca5e367914fa32ee…

MALICIOUS

PDF

74.3 KB Created: 2021-03-03 09:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fc299875f8e8b8e1fac2ce1505237cbb SHA-1: 36664263d0a28c74b0f67afbf1200326152924f9 SHA-256: ca5e367914fa32ee6b409a1b5a0a93667822d8c202c9e2dacd8074fb11012eed
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/wix?keyword=relacion+de+inscritos+en+digeibira+2020 PDF link annotation
    • https://cdn.sqhk.co/kisasizaro/dig9rij/capitalism_a_love_story_movie_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/bavimimo/ifhb6Jt/final_fantasy_games_order_to_play.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/jjawCjc/zunagedojopapejefepal.pdfIn PDF document text
    • http://nawabopebi.iblogger.org/14809048739.pdfIn PDF document text
    • https://cdn.sqhk.co/mabisurud/e1ggijh/range_rover_defender_1997_for_sale.pdfIn PDF document text
    • https://padilokemim.weebly.com/uploads/1/3/1/3/131381900/kedipato.pdfIn PDF document text
    • http://zufavuk.22web.org/batimezipumuxaditorazore.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/fimepapuzixagok.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/kxjeiiK/how_to_play_among_us_with_100_players.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/long_way_down_chapter_summary.pdfIn PDF document text
    • https://xuvaguwofivopi.weebly.com/uploads/1/3/4/4/134463587/3065490.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/njakgef/question_box_emoji_copy_and_paste.pdfIn PDF document text
    • https://duludogom.weebly.com/uploads/1/3/4/6/134673238/pikarimamexajajenafo.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefaxeker/zbLhbge/nugidasokiboras.pdfIn PDF document text
    • http://futegejetebe.22web.org/bootcamp_drivers_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/zgcgdja/kuniro.pdfIn PDF document text
    • https://fikejibin.weebly.com/uploads/1/3/4/3/134331262/liwanoxerapoje_mafilumidazub_bizig_sinutexowidage.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sewadereweben.epizy.com/cerebro_humano_e_suas_funes.pdfIn PDF document text
    • http://lojawesepex.rf.gd/bloons_tower_defense_5_flash.pdfIn PDF document text
    • http://zoratazux.epizy.com/7545475795.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_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 5528 bytes
SHA-256: 52558f03e981a7cae853fd5a87b38002813bca604d0064f510bbbe2a4abdef56
font_01_sfnt_off0000f54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 12292 bytes
SHA-256: 31db541a9eaf3bae9c53a30a051827e3f1f842ba215db165b55dde120f1ff555

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