Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e8e3e89fdcd208…

MALICIOUS

PDF

78.8 KB Created: 2021-03-15 23:23:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1acc5e62f66a7459115625fbf1a9e1fd SHA-1: 5eba7170064368942fd33738a83a946cc47e7210 SHA-256: f2e8e3e89fdcd208fd526deb6aee6178fa34841d704821e5b85cc09998120ac2
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 0.9992

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://zajinet.ru/award?keyword=ergonomie+au+cabinet+dentaire+pdf PDF link annotation
    • https://tejikapor.weebly.com/uploads/1/3/1/3/131382395/6259306.pdfIn PDF document text
    • https://jasasexu.weebly.com/uploads/1/3/1/1/131163864/benufemejosusar.pdfIn PDF document text
    • http://7evenrp.ru/wubodifxt25.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/ketixuwamelokiwupotuvurow.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/how_to_search_google_like_a_pro.pdfIn PDF document text
    • https://bigimenuxorotel.weebly.com/uploads/1/3/4/6/134655509/02a1a.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/lukuboz.pdfIn PDF document text
    • https://guxozagubixox.weebly.com/uploads/1/3/1/4/131437827/jumobaxesileg.pdfIn PDF document text
    • http://prodive.su/97892100861eyv7v.pdfIn PDF document text
    • http://help-copyrightservice.xyz/linux_system_programming_tutorial_for_beginnersydwia.pdfIn PDF document text
    • http://jabudapitu.scienceontheweb.net/narovafixavejufixiwuv.pdfIn PDF document text
    • https://sivikowililip.weebly.com/uploads/1/3/4/5/134599649/2694872.pdfIn PDF document text
    • https://nipukidifa.weebly.com/uploads/1/3/0/8/130873732/nozavo-tedolam-wetimikid.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/speed_queen_dryers_at_lowes.pdfIn PDF document text
    • http://sputnews.com/braverman_company_has_two_manufactur50rzs.pdfIn PDF document text
    • https://zibezalobe.weebly.com/uploads/1/3/4/5/134529300/defilekirababa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ludugatitabi.atwebpages.com/ladavufex.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/star_wars_quiz_questions_printable.pdfIn PDF document text
    • http://furunes.onlinewebshop.net/gameshark_cheats_pokemon_ruby.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/selena_gomez_13_reasons_why_song_season_3.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/background_color_android_status_bar.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/20666252634.pdfIn PDF document text
    • http://kakavogulogij.onlinewebshop.net/jevaziwepinidipujabaz.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_off0000f233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF233 5360 bytes
SHA-256: b7f2f3aac1625d920440dd8d2df50cf8ce66d83345216e8309b74bbed8df9957
font_01_sfnt_off0001045a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 12460 bytes
SHA-256: cbcdbaab7cb968ca7eb042d4af15e3ce253ce232420a5a858a35bc698ef668da

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