Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f213c3750e6710d…

MALICIOUS

PDF

80.4 KB Created: 2021-03-11 09:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 768929862db2fdc9d1e17c2f3960d96b SHA-1: 59e129940ed42d379e6134e669ae8d1a367ecad0 SHA-256: 1f213c3750e6710da41d2cefbd918cf2483ce5c4321ccda80d9f419d70ffe413
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 0.9993

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://kuzutuzo.ru/award?keyword=online+translate+pdf+chinese+to+english PDF link annotation
    • https://bidopafogusiw.weebly.com/uploads/1/3/1/0/131070115/nofodovovesi-biwebugubala-bogudewavawomo.pdfIn PDF document text
    • http://kobujiva.iblogger.org/kutigawazemolaxakofujib.pdfIn PDF document text
    • http://okclub.org/grade_4_spelling_words_canadak1uta.pdfIn PDF document text
    • http://lamatokatov.22web.org/cara_codashop_pro.pdfIn PDF document text
    • http://hookup673.site/lojudominowisimycfbn.pdfIn PDF document text
    • http://azules.ru/how_to_use_the_cuisinart_ice_cream_machineg0f6d.pdfIn PDF document text
    • http://tarusexozof.iblogger.org/basalt_columns_formed_by_cooling_lava.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/the_fox_and_the_crow_lesson.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/church_of_the_flying_spaghetti_monster_bible.pdfIn PDF document text
    • https://jozinuzo.weebly.com/uploads/1/3/2/7/132712000/lavemoduruluze.pdfIn PDF document text
    • http://jofarofuwudeveb.66ghz.com/2015_acute_ischemic_stroke_guidelines.pdfIn PDF document text
    • https://semoburepov.weebly.com/uploads/1/3/2/8/132815840/buzojod.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/8351422.pdfIn PDF document text
    • https://gaburidukir.weebly.com/uploads/1/3/4/4/134463400/cb286dbaf.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/zesotat/cambridge_ielts_2_listening_test_4_answers.pdfIn PDF document text
    • http://mibofive.epizy.com/lepekupiw.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/aion_mobile_game.pdfIn PDF document text
    • http://nenizumudi.rf.gd/brick_bat_coba_waterproofing_procedure.pdfIn PDF document text
    • http://regenazuwirege.epizy.com/ripokitelunudikekog.pdfIn PDF document text
    • http://jenetowagipose.rf.gd/rent_agreement_contract.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/ruzasuwisimusovofi.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/grammar_worksheets_on_comparative_and_superlative_adjectives.pdfIn PDF document text
    • http://pulawev.epizy.com/letter_of_resignation_template_word_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/wysiwyg_website_builder_software_free.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/75277419526.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_off0000fe2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2D 5444 bytes
SHA-256: ab363a7d0c0ece4830702b7de0098f55ea4199035ffe9c6202937cf6c517035c
font_01_sfnt_off000110a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A8 10388 bytes
SHA-256: d584fb3809af7295b7abfc11f395031b4ce1c348492c76b388beff2c49b6c511

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