Malicious PDF — malware analysis report

Static analysis result for SHA-256 6122a2b26195e55d…

MALICIOUS

PDF

71.1 KB Created: 2021-04-01 22:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e345f922812465cc9f67ca81cfd5472a SHA-1: 0f0e0ed9df529fd57428c93a9ec6e6b6e3dcc6cd SHA-256: 6122a2b26195e55de9d7bf1e1c9d3fc80ea01de398f414a94a8c106fc3e11f40
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, indicative of a link farm or phishing lure, with one primary URL being 'https://soxebez.ru/award?keyword=aqua+de+beber+sheet+pdf'. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics point towards a phishing or scam campaign designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/award?keyword=aqua+de+beber+sheet+pdf
    • https://popaxeras.weebly.com/uploads/1/3/0/8/130814769/6aa3bd12bb88e9.pdf
    • https://pelefazefipaguj.weebly.com/uploads/1/3/4/8/134892892/bizexon.pdf
    • https://jutegejedexugak.weebly.com/uploads/1/3/5/3/135384922/048a7a.pdf
    • http://buyfastedcircle.xyz/99197255508pte6l.pdf
    • https://rinapaluvubozi.weebly.com/uploads/1/3/4/6/134669605/bf87593.pdf
    • https://tuzeninepag.weebly.com/uploads/1/3/2/8/132814935/d516b3b69f33b53.pdf
    • https://jipepusubame.weebly.com/uploads/1/3/4/0/134040653/685583.pdf
    • https://negofajosodin.weebly.com/uploads/1/3/5/3/135314147/4006dd914241.pdf
    • https://lerinaxupol.weebly.com/uploads/1/3/4/6/134662503/guribu.pdf
    • https://rakiletapaleta.weebly.com/uploads/1/3/1/8/131856645/f13574668ef4889.pdf
    • https://sujofunipus.weebly.com/uploads/1/3/4/5/134502209/tedifolulapojedufadi.pdf
    • https://vafunaparixidi.weebly.com/uploads/1/3/4/6/134627598/jorefonix.pdf
    • http://rubeatyshop.xyz/65827412810jfcy4.pdf
    • http://goodik.fun/ejercicios_notacion_cientifica_3_eso_con_solucioneskcmu7.pdf
    • http://quickpapp.online/icom_portable_aircraft_radiok725f.pdf
    • https://vatubovelogised.weebly.com/uploads/1/3/4/3/134375195/kawadaxiveko.pdf
    • https://wokabilizivamu.weebly.com/uploads/1/3/2/7/132712023/zipaperopusezujiguj.pdf
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/8122977.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://965bd944-310b-4209-a71a-d16e45aaced4.filesusr.com/ugd/5f02e6_5db84ddb4e224cbfb21f5b2609f50fcc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/96d59137-33bd-4562-aca0-efc094e399af/daxeninideju.pdf
    • https://uploads.strikinglycdn.com/files/3c4104eb-11dc-48fc-a86d-9c378749692d/xalonanejejidudaze.pdf
    • https://uploads.strikinglycdn.com/files/a5da9947-b81f-49db-9403-e1be21ba4e01/how_common_are_genetic_disorders.pdf
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_67bbb82ec67144b79d9e6300322b66e9.pdf?index=true
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_f2bbd655c01c49fd89116fef4d722f98.pdf?index=true
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_6beac21520a74a8f95d7692206c1aa85.pdf?index=true
    • https://f568b852-d776-40fc-afde-b4c2ef929a3a.filesusr.com/ugd/2d6fb2_6eefd72640c64fa6a0dda504223b4d74.pdf?index=true
    • https://uploads.strikinglycdn.com/files/65fa313c-e977-4614-a14e-6e10e2a43cd9/4216113486.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d715.bin
ddd5169411a9d1d47b1a6ae745d26e92067e4b9e3f2f25196fad0a1705652554		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD715 5352 bytes
font_01_sfnt_off0000e937.bin
dc73b90bf7c4796893ecb4c3051c8f99a84973fa03a72e1fdf08fe0c16799933		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE937 11032 bytes

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