Malicious PDF — malware analysis report

Static analysis result for SHA-256 d198ada00cb2644f…

MALICIOUS

PDF

94.1 KB Created: 2021-03-27 18:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6108b13683ca14c98b23eab57d718f07 SHA-1: 564960be52099c0f186a5f8b9fe61d996639ad45 SHA-256: d198ada00cb2644f73275584600e08e943dd51cb5d49d739310d7575714b665a
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 0.9996

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://nipisod.ru/123?utm_term=arizona+a4+2018+form PDF link annotation
    • https://desalipi.weebly.com/uploads/1/3/2/6/132681317/e97ed9bddd88297.pdfIn PDF document text
    • https://cdn.sqhk.co/salejejo/VgeQgVc/35547029899.pdfIn PDF document text
    • http://lorem.space/the_selection_series_movie_casting_director7flep.pdfIn PDF document text
    • http://javebamugizal.66ghz.com/synaptics_driver_windows_10_64_bit.pdfIn PDF document text
    • https://feronokemafa.weebly.com/uploads/1/3/1/1/131164109/2698124.pdfIn PDF document text
    • https://cdn.sqhk.co/gatezoru/haphcat/71294954738.pdfIn PDF document text
    • http://sellforce.ru/ernest_hemingway_cat_in_the_rainitu98.pdfIn PDF document text
    • http://fusubakitakudup.66ghz.com/intex_sand_filter_pump_set_up.pdfIn PDF document text
    • http://mamubisuk.mypressonline.com/cultural_historical_activity_theory_course.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/budismo_moderno_livro.pdfIn PDF document text
    • http://kosonetibekub.medianewsonline.com/cancionero_de_guitarra_rock_nacional.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/intel_corporate_brand_identity_guidelines5gwsq.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/gdVCjfn/disney_princess_printable_coloring_book.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/58420451972.pdfIn PDF document text
    • http://electorat.org/88777013504fzrvm.pdfIn PDF document text
    • http://appletopshop.ru/bekhayali_song_mr_jatt_kabir_singhv0sb2.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puvapulugo.onlinewebshop.net/soketugu.pdfIn PDF document text
    • http://punazujekir.epizy.com/bawara_mann_maya_nadhi_song_free.pdfIn PDF document text
    • http://vosowetawevu.epizy.com/72001959054.pdfIn PDF document text
    • http://zerujafulo.rf.gd/how_to_backup_deleted_pictures_on_android.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11164 1656 bytes
SHA-256: feb2c778da0ab77b352450d992510a470b95a56094b728c80d114f1f16b8e6d9
font_01_sfnt_off000119a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A5 5352 bytes
SHA-256: 3a88053ed2b2ba2c6d3cf1369720010702b6ac401d4fb67f9c66f2f118530ef8
font_02_sfnt_off00012bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD6 12156 bytes
SHA-256: ef29b00b8d423dc85ea3ff4f3926ea91b74baeb14b020270223bfbdc869f8f87
font_03_sfnt_off0001552a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1552A 16140 bytes
SHA-256: 00468df452218f546d59995a7cf9b4297092e2fd476dbd2f6ce79846bd051107