Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05439c30cc8255c…

MALICIOUS

PDF

79.9 KB Created: 2021-03-26 07:57:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0fdaa013f4345c8e2436486e6ba12feb SHA-1: 948f0ab1df2d294d91b55b77d170778ba35f49e4 SHA-256: b05439c30cc8255cc0a0dcef56b36b59c160df22ace974f7a06c3dab40fa7632
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 0.9993

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://botokaw.ru/wix?keyword=the+yusa+guide+to+balance+mind+body+spirit+free+pdf PDF link annotation
    • https://jaduvobawitirok.weebly.com/uploads/1/3/4/3/134398576/57bcf2f9c8117cb.pdfIn PDF document text
    • http://terugate.mypressonline.com/risex.pdfIn PDF document text
    • http://jotusimemirido.sportsontheweb.net/77909144568.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/how_do_i_reset_my_canon_pixma_mx922_printer.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/how_to_transfer_a_game_to_another_ps4_account.pdfIn PDF document text
    • http://sosuziba.mypressonline.com/tujekaj.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/how_to_schedule_an_appointment_to_renew_drivers_license.pdfIn PDF document text
    • https://webupusew.weebly.com/uploads/1/3/5/3/135344455/bukavuzaxop-jawil-pimaxikep.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/segolexixux.pdfIn PDF document text
    • https://somalinoduka.weebly.com/uploads/1/3/5/3/135392385/8472846.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/principles_of_electronic_communication_systems_ppt_chapter_12.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/will_50_shades_of_grey_be_on_netflix.pdfIn PDF document text
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/nirut-tebopubadupaw-zodudarux.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/cc5e2df3-3fb4-427e-871b-cd4791c07481/62175891499.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/critical_analysis_of_letter_from_birmingham_jail.pdfIn PDF document text
    • http://dirazonun.myartsonline.com/wamabejolorugiban.pdfIn PDF document text
    • http://sajatuvireguta.atwebpages.com/tecnologia_da_informao_concurso.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/gamification_coursera_answers.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/11101503573.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/tipawi.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/49412766678.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/99297496506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adbcdc25-b2c9-478f-b8d3-af52df19468e/fifubegusoviza.pdfIn PDF document text
    • http://kegigija.atwebpages.com/fokivusova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/067b661f-2d67-47d5-873e-2bbcbe5f728b/how_to_convert_jpg_to_on_macbook_air.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_off0000f928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF928 5760 bytes
SHA-256: a1535f90a3947f02768697a6232821aa52ab43b27a8dc066d82d01da68c39897
font_01_sfnt_off00010ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA4 10840 bytes
SHA-256: d3dd915dcb3ad28104af6b61c6a7351cb3fbc4c9b1a8a1863d83191615268b31

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