Malicious PDF — malware analysis report

Static analysis result for SHA-256 6470c12a0d909916…

MALICIOUS

PDF

113.3 KB Created: 2021-03-23 09:06:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84131a88d283e3f637fb86f5acd144c7 SHA-1: 164be23de8c260f5b931ac4ce328366420332de2 SHA-256: 6470c12a0d90991627d84046a43820c4159cccf183578ac7ebe9bf5b40c6ce47
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. The document contains a mass external PDF link farm, with numerous URLs pointing to other PDF files, likely intended to manipulate search engine rankings or redirect users to malicious content. The embedded URLs and the PDF structure suggest an attempt to lure users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=schoolhouse+rock+live+jr+script+pdf
    • https://lemusovigezamo.weebly.com/uploads/1/3/1/3/131381045/xovemedogemuvojejovi.pdf
    • http://tidirakozodawon.getenjoyment.net/maya_angelou_poems_woman_work.pdf
    • https://cdn-cms.f-static.net/uploads/4374362/normal_60544f7fab95e.pdf
    • http://fonixeguga.mywebcommunity.org/40655319280.pdf
    • https://datuzela.weebly.com/uploads/1/3/4/1/134109276/sezebeme_duvagoto_gazaxepuvuwere.pdf
    • http://solusaxisabo.scienceontheweb.net/kesuwowarovuf.pdf
    • http://digovin.getenjoyment.net/nogujovanugijimivo.pdf
    • http://miwasigal.mywebcommunity.org/97675962530.pdf
    • https://niberijiv.weebly.com/uploads/1/3/4/0/134017170/zudugiramajesi.pdf
    • http://duwinijuj.mypressonline.com/barfu_am_klavier_piano_sheet_music.pdf
    • https://cdn-cms.f-static.net/uploads/4458412/normal_60118a981ca1f.pdf
    • http://zujewubowufonug.scienceontheweb.net/ximevutoneziva.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sojaxub/telecharger_clavier_android_azerty_gratuit.pdf
    • https://s3.amazonaws.com/gekixadonuru/93243062474.pdf
    • https://s3.amazonaws.com/xowasosuf/7413806988.pdf
    • https://s3.amazonaws.com/wefadep/what_is_shared_parental_responsibility_florida.pdf
    • https://s3.amazonaws.com/genukopapovixo/excel_spreadsheet_drop_down_list_multiple_selection.pdf
    • https://s3.amazonaws.com/wiremeresegikon/xomut.pdf
    • https://s3.amazonaws.com/zebarufuridorur/oss_bss_overview.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_off00017f65.bin
ee816d7f3cac9596cae00cde8ea03edadfcc18a7ee257bec368c11be2426dca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F65 5336 bytes
font_01_sfnt_off00019197.bin
05429bef30b5c3d7da7975dfaafaade05213eb96d6890a9a59c8bcfb502f6e71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19197 11148 bytes

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