Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae599d54d618875…

MALICIOUS

PDF

69.5 KB Created: 2021-01-31 23:53:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 982051cd1cf3f1eea3b25f611def77dc SHA-1: 7b5e91135c7b7330ae3a053071e465684c57bac5 SHA-256: 4ae599d54d618875ad2d6f8c2ec55efb79fb2647fa96ee84d1938de6d2057525
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=areal+trekant+formel In PDF document text
    • https://veralekixa.weebly.com/uploads/1/3/1/0/131069874/bovagenodar_redor_wigefazijabamo_selevevile.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/Bbjjxib/78316617349.pdfIn PDF document text
    • http://gratoraama.website/geotours_worksheet_f_answersagxod.pdfIn PDF document text
    • https://kisagisetiduke.weebly.com/uploads/1/3/4/7/134762251/gelitaji.pdfIn PDF document text
    • http://tuwafanumi.iblogger.org/pokemon_game_fire_red_version_free.pdfIn PDF document text
    • https://jasebezaf.weebly.com/uploads/1/3/4/6/134630561/5b50532090c538.pdfIn PDF document text
    • https://bojowavezuzabi.weebly.com/uploads/1/3/1/3/131382797/95c96e15663f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/hematological_oncology_author_guidelines.pdfIn PDF document text
    • http://rubidolad.epizy.com/wudibov.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/honkai_impact_3_guide.pdfIn PDF document text
    • http://faxanudof.epizy.com/answer_you_meaning_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/charitable_trust_deed_template_nz.pdfIn PDF document text
    • http://pinogizege.rf.gd/app_video_free_ios.pdfIn PDF document text
    • http://pepebejawu.epizy.com/adding_positive_integers_worksheet.pdfIn PDF document text
    • http://muzubakow.epizy.com/13144935041.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_off0000d05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05F 4788 bytes
SHA-256: e79313a51c8cddd876ec2e8355e7b943f0e97eb2c142eca480c3fa51fffbc13a
font_01_sfnt_off0000e096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE096 12020 bytes
SHA-256: cdc5852e70f82b71097023915d0ce72cf55d8167150c84e25b6390d2b6e1620b