Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8670e8a8726ff4…

MALICIOUS

PDF

106.9 KB Created: 2021-01-19 15:09:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2837b4a0b56fbbbd77b0b70a029f0e7a SHA-1: f42cb2a5be3cc410fcf358524c08259205069aeb SHA-256: ce8670e8a8726ff4169bff9f91f39d1d8503559f5972ea7412aebc3ee5b91899
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/123?utm_term=west+point+fishing+reports PDF link annotation
    • https://site-1176040.mozfiles.com/files/1176040/terminator_2_soundtrack.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/Dihhh9f/world_soccer_talk_premier_league_schedule.pdfIn PDF document text
    • https://site-1172263.mozfiles.com/files/1172263/airlift_performance_v2_controller.pdfIn PDF document text
    • https://site-1248241.mozfiles.com/files/1248241/hazard_vulnerability_assessment_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459175/normal_5fecec0de2bf0.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/ij8ieD6/zombie_things_on_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/jaNfji3/wizard_of_oz_munchkins_song.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/ieSV44s/recarga_amigo_entretenimiento_telcel_que_es.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490244/normal_5fbe5cb7a0f15.pdfIn PDF document text
    • https://site-1223979.mozfiles.com/files/1223979/ada_code_for_surgical_guide_stent.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369788/normal_5ff667e398097.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5ff6105235104.pdfIn PDF document text
    • https://cdn.sqhk.co/jememobak/jjaQhgd/infinite_flight_simulator_full_cracked_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bikikifuxax.epizy.com/hearthstone_arena_guide_witchwood.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/infographic_template_free_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/currency_transaction_report_by_casinos_form_103.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/delhi_university_date_sheet_2019_december.pdfIn PDF document text
    • http://mujujum.epizy.com/dewiditarejafapenidez.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/55838493224.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/metformin_weight_loss_pcos_success_stories.pdfIn PDF document text
    • http://jopiwutipav.epizy.com/beep_sound_mass_tamilan.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_off000164f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164F2 4936 bytes
SHA-256: 02865bba7cb67bd69b79e96682767ad78bf8fd375b04e3982ce768495440ff3f
font_01_sfnt_off000175cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175CC 11932 bytes
SHA-256: 986f6f178e0203323908e2cf4239b22fb98346d7328cae01a94790e040c5f60e

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