Malicious PDF — malware analysis report

Static analysis result for SHA-256 5793176feb41961e…

MALICIOUS

PDF

82.6 KB Created: 2021-04-13 22:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: eb3f827c0ff5d3dcd8a310282c6ab825 SHA-1: 199b76371ef5cea2b26fcab5961f84e4cd31b1c9 SHA-256: 5793176feb41961ed0e468de04a5f38e227e55cb970946d5f929ab860cb941c4
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://dugedepap.ru/strik?utm_term=r15+v3+bs6+launch+date+in+india PDF link annotation
    • http://shishkin-seed.xyz/mojukobivafow5c7l.pdfIn PDF document text
    • http://roflan.site/xokeponigagilusefexexi5dm1u.pdfIn PDF document text
    • http://istlan.space/42749047724ouawd.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/je5djho/soraxunaropiziwewazeku.pdfIn PDF document text
    • http://premiumpornclips.com/bartonella_bacilliformis_prevencionyadgr.pdfIn PDF document text
    • http://ririzobe.medianewsonline.com/konuxaburobigalos.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/sunbeam_fan_heater_reviews.pdfIn PDF document text
    • http://dutov.org/79552570469upimr.pdfIn PDF document text
    • http://gadosamu.iblogger.org/filanin.pdfIn PDF document text
    • http://silewugebed.scienceontheweb.net/ablowitz_fokas_complex_variables.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/jc3icel/credit_freeze_equifax_breach.pdfIn PDF document text
    • http://cardio-natural.info/should_i_use_audacitycl4bq.pdfIn PDF document text
    • http://mebets.xyz/didokevenuwepetasabimuridmhy6a.pdfIn PDF document text
    • http://idealslimitaly-official.site/962812005243hhqa.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/5855d030-b74c-45d8-9837-c6a70fcb5916/diccionario_portugues_espaol_larousse.pdfIn PDF document text
    • http://kajemirari.rf.gd/application_programming_interface_adalah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd8a9d4-4d82-47e3-93e4-13e2ed5ac1e6/sauder_homeplus_storage_cabinet_assembly_instructions.pdfIn PDF document text
    • http://zulexesovo.epizy.com/lease_addendum_template_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7bae16-4eb7-4c4b-9293-7313d30b4f9f/38141330810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67ab5bc0-7c3c-4fe8-8711-d1208c9203a4/87246131430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/035b2da3-8f40-4b74-add9-c5834dd6b63c/dotilarovek.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_off0000f010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF010 5632 bytes
SHA-256: 5d69bf85bb602cf33271e9fa925088d8de8edd4cdbc018546ff8064aa229db25
font_01_sfnt_off00010341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10341 10540 bytes
SHA-256: 90b3d83eef250c114ccf0b2627e03bcb6939cfede9bba0924cf08e874acc8381
font_02_sfnt_off00012763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12763 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6