Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a4cc0068ac9016…

MALICIOUS

PDF

77.8 KB Created: 2021-05-01 05:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6c371df9a939f9c6229333fa867f64ef SHA-1: 313b2ba6c874a52f55154c55f0da12f8c957e7a0 SHA-256: 49a4cc0068ac9016f16230918867e4fccb078a9a546d98f1fd3145309cebb59e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://golowaki.ru/strik?utm_term=1978+john+deere+316+attachments PDF link annotation
    • http://tinutig.22web.org/deficiency_account_insolvency_template.pdfIn PDF document text
    • http://nawajojipiv.iblogger.org/what_is_grimms_fairy_tales.pdfIn PDF document text
    • http://jukavoluv.iblogger.org/34527957771.pdfIn PDF document text
    • https://varepanuror.weebly.com/uploads/1/3/5/3/135394497/moludul.pdfIn PDF document text
    • https://vopupina.weebly.com/uploads/1/3/1/0/131070761/b6bec2952bdd73.pdfIn PDF document text
    • https://duxezixupedad.weebly.com/uploads/1/3/4/0/134095883/gitegetamapabonu.pdfIn PDF document text
    • http://vivujivavo.iblogger.org/kidexofejetasidaf.pdfIn PDF document text
    • https://palogipotutaz.weebly.com/uploads/1/3/2/8/132814365/ac4e06de0ca.pdfIn PDF document text
    • http://mabobuluka.iblogger.org/20131493552.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kunamemel.epizy.com/68082659480.pdfIn PDF document text
    • http://rixuroruwe.myartsonline.com/crestron_cen_swpoe_16.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad4932f-dbd1-40fe-8a46-f7f8f7784d28/73706986630.pdfIn PDF document text
    • http://xerozodofuvu.epizy.com/the_god_code_history_channel_watch_online.pdfIn PDF document text
    • http://juzatapanosuwi.rf.gd/lafapidabifu.pdfIn PDF document text
    • http://gidegezujonin.rf.gd/the_well_behaved_child.pdfIn PDF document text
    • http://nenilezum.epizy.com/47628664197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aea23bd0-0bf7-4743-abca-20757ef7f6a2/how_much_does_a_full_makeup_kit_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a716ea3-9b08-4091-9ca1-661348db1f18/21547726237.pdfIn PDF document text
    • http://volajigatume.epizy.com/avoir_etre_faire_aller_worksheets.pdfIn PDF document text
    • http://dijipola.onlinewebshop.net/18335790060.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/what_are_the_types_of_research_instruments.pdfIn PDF document text
    • http://pidezesu.rf.gd/mividinuditobulazovixutud.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/affinities_of_prototheria.pdfIn PDF document text
    • http://rolavamaget.rf.gd/speak_your_mind_1_teacher_s_book.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_off0000efa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA5 5928 bytes
SHA-256: c0a359584165a412cc9ee4e7b2659e815bc57603085d6af614596974789bc1c7
font_01_sfnt_off000103a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A6 11180 bytes
SHA-256: 41ddba3f95507ceecd74a4f40bc3f1d81d7168232c3b790ff310772a9c539680

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