Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5de12123bea2bcd…

MALICIOUS

PDF

75.7 KB Created: 2021-04-14 00:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a1fb9185c42102f5fcf804e5e6d69605 SHA-1: 5300fb7e0ab7f0c2c99faa0a4165f1848be24f27 SHA-256: a5de12123bea2bcdeefc17d54c6764e71ea452a4ce41ea623907418afcdb4b01
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 0.9997

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://bologen.ru/strik?utm_term=can+you+connect+alexa+to+vizio+sound+bar PDF link annotation
    • https://cdn.sqhk.co/madosodu/Khdgjge/dominos_5._99_deal_items.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/ps_vita_emulator_mobile_games.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/isentropic_efficiency_reciprocating_compressor.pdfIn PDF document text
    • https://cdn.sqhk.co/penavagalo/hfhfhiH/iron_out_meaning_synonym.pdfIn PDF document text
    • http://kajuzumanaz.sportsontheweb.net/a_thousand_years_piano_sheet_music_easy_free.pdfIn PDF document text
    • https://tajadituzutop.weebly.com/uploads/1/3/1/4/131409135/bujuwalab-tutosoxemux.pdfIn PDF document text
    • http://rorogudadusosej.getenjoyment.net/mubazoribikisofuxo.pdfIn PDF document text
    • https://bolukuja.weebly.com/uploads/1/3/0/7/130739437/801060.pdfIn PDF document text
    • http://pofizivor.22web.org/moonlight_sonata_3nd_movement_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/eidhglm/famous_voice_changer_online.pdfIn PDF document text
    • https://wudajelenap.weebly.com/uploads/1/3/4/4/134470879/zelubiro_nofujaxavek.pdfIn PDF document text
    • https://lokevevivepino.weebly.com/uploads/1/3/4/1/134131736/wagiwajelubu-mopujelubijir-mifevewubujo.pdfIn PDF document text
    • https://wojawuminusevob.weebly.com/uploads/1/3/4/6/134694879/gekewogifutogi-tujuzijug-natal-vewesego.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://katetagozu.epizy.com/algebra_2_transformations_cheat_sheet.pdfIn PDF document text
    • http://dalejavevofa.rf.gd/simplification_and_approximation_questions_for_bank_po.pdfIn PDF document text
    • http://mitotubuxabax.epizy.com/degradacion_quimica_del_suelo.pdfIn PDF document text
    • http://visobiwedixupip.rf.gd/deferred_start_up_costs_balance_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be6f84c-2f54-418d-a476-d65380b2d730/21048212814.pdfIn PDF document text
    • http://badamowafe.onlinewebshop.net/livro_budismo_psicologia_do_autoconhecimento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/686278e7-4a0b-4367-9891-3757dd8ea111/the_other_side_of_midnight_dvd_region_2.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_off0000eda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA1 5260 bytes
SHA-256: cadf02a281eb9ad844e4f3da145101a9f6fd195ab361adfd995f6d7bba7c4ff6
font_01_sfnt_off0000ff9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9B 9856 bytes
SHA-256: b809780c4d6ac0455f263d09a038820b76b090c15961a6ee0080a9737f39f36a

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