Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef82fbfad8f2c21…

MALICIOUS

PDF

87.2 KB Created: 2021-02-15 14:46:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4e2301bbaa974d4ce1811108e41248eb SHA-1: 9d7f41f398dd8932d65c00cfb1682a13244dbfb7 SHA-256: bef82fbfad8f2c216468f78fba1538625abae7b44c60bd152c41ef0cb66d12bf
126 Risk Score

Malware Insights

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

The PDF document contains a lure related to watching a movie online, which is a common tactic for phishing or malware distribution. It embeds multiple external URIs, with a primary one pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for downloading a second-stage payload.

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
  • 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=the+last+song+full+movie+in+hindi+dubbed+watch+online PDF link annotation
    • https://cdn.sqhk.co/jenetuwuda/lry2dgi/doximesamoteguwaz.pdfIn PDF document text
    • http://roflan.site/94214486126r4y6o.pdfIn PDF document text
    • https://lipofodimeduwep.weebly.com/uploads/1/3/0/8/130813747/kogosizoriximidiki.pdfIn PDF document text
    • http://lianhua.life/arduino_based_biomedical_instrumentation_projectsapl8i.pdfIn PDF document text
    • http://sberin.xyz/vomebikzzoge.pdfIn PDF document text
    • https://tewamuwomipatus.weebly.com/uploads/1/3/0/9/130969874/1203163.pdfIn PDF document text
    • http://fly-drive.online/2020_nsfas_application_form_downloadd4y3q.pdfIn PDF document text
    • http://de-bewertung-889562.icu/attendance_management_solution_x100c3sx6k.pdfIn PDF document text
    • https://fofifiso.weebly.com/uploads/1/3/4/6/134613093/ripefikogekigazaw.pdfIn PDF document text
    • https://sojujigun.weebly.com/uploads/1/3/0/9/130969910/kinosenejo.pdfIn PDF document text
    • http://tonagruz.ru/ninudotehmrr.pdfIn PDF document text
    • http://rmk4sale.xyz/xuxibupyzind.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://karifopiti.epizy.com/ielts_test_with_answers.pdfIn PDF document text
    • http://lasuwutiganije.rf.gd/56230191953.pdfIn PDF document text
    • http://nujuxat.epizy.com/dear_santa_template_word.pdfIn PDF document text
    • http://marivugedada.epizy.com/blackberry_torch_9860_flash_file.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_off00011800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11800 5580 bytes
SHA-256: f6fc88438690ce47a208aa6ce8d87f8ffc6f95567028214c562440f4226fb690
font_01_sfnt_off00012af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF3 10716 bytes
SHA-256: 32d74076284516200a47546d45972503fd2986371b24885284982fc4d070ccf8

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