Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c868d05ad20597…

MALICIOUS

PDF

168.3 KB Created: 2021-04-14 15:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4d24c3834b6e2a878b1527a8a8416545 SHA-1: dabc5891953e0b00ab065f130f125efb4343d568 SHA-256: e0c868d05ad205977bba7bf1f974815d118787d65f71f5becf6ade41831c5feb
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 0.9994

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://maypoin.ru/strik?utm_term=textos+apocrifos+del+antiguo+testamento+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366341/normal_60200ae4b903f.pdfIn PDF document text
    • http://itdomen.fun/chessbase_free_for_pcx5zho.pdfIn PDF document text
    • http://rorogudadusosej.getenjoyment.net/figuvejuporovuneruko.pdfIn PDF document text
    • http://uscarins.info/mifujikavadibuwizayyawc.pdfIn PDF document text
    • http://domastmsk.space/irregular_plural_nouns_worksheet_6th_grade7wlqh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469641/normal_60348ad206cb0.pdfIn PDF document text
    • http://bafekovarobuju.iblogger.org/secondary_school_report_card_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_6024432645fd3.pdfIn PDF document text
    • http://bezprovodov.guru/lopi_wood_stove_insert_double_dooryi09s.pdfIn PDF document text
    • http://burrrhey.tech/sidoniwo4xhnh.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/ross_carbonite_solo_frame.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/kudanipurarogimexugudogu.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/hachhji/huey_lewis_radio_6_playlist.pdfIn PDF document text
    • https://cdn.sqhk.co/risubibasero/PuicgdT/33096919455.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/9b0ac3cd-5a92-406d-b1ab-a83a59ab6ab4/39329629925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1d4539-6c80-4185-bc47-b528a088e552/diono_radian_3r_latch_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db529cc8-42d0-41fc-8f18-69f30af5a858/how_to_work_a_philips_voice_tracer.pdfIn PDF document text
    • http://lubasabutatubo.rf.gd/54615989664.pdfIn PDF document text
    • http://ludujefu.epizy.com/free_thanksgiving_borders_for_word_documents_templates.pdfIn PDF document text
    • http://ruxuwidoke.epizy.com/best_book_for_learning_python.pdfIn PDF document text
    • http://fikunirivitov.rf.gd/in_lesson_planning_what_does_activating_prior_knowledge_mean.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23A61 5492 bytes
SHA-256: b61be5d0195e98ec99b2a075c7df5f5684167a7da05816b00d3b46c61fe83a77
font_01_sfnt_off00024d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24D04 15940 bytes
SHA-256: 32b3d420a0ef4a078d972d2ebca5233d1c3ae9d1356e99b1025b99ad66e59a94
font_02_sfnt_off00027c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27C51 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d