Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e27f676c9469432…

MALICIOUS

PDF

85.7 KB Created: 2021-03-06 04:09:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d5e2471344306ca5b0649e513dad26b9 SHA-1: 5f618e1fa550fe8bcbf96dac24088e2150c2b314 SHA-256: 2e27f676c946943235a333437bbfeb48045fb96d1c66fc44a94c0ff2af0fa852
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 0.9967

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://kuzutuzo.ru/123?utm_term=marlin+model+60w+disassembly PDF link annotation
    • http://salonlabs.xyz/kidojeraxowovito8s4u.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/tsyjdkc/keyboard_piano_for_beginners_songs.pdfIn PDF document text
    • https://jovigazever.weebly.com/uploads/1/3/1/6/131637362/5586937.pdfIn PDF document text
    • https://divetuguwopad.weebly.com/uploads/1/3/0/7/130739619/62d578d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502246/normal_5fe975bcb608a.pdfIn PDF document text
    • http://reduslimitalia-official.site/38431899345xlmfq.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/8TibQKr/laptop_open_camera_app.pdfIn PDF document text
    • http://romeita.space/dutuxoxuregafhi6u.pdfIn PDF document text
    • http://distornyup.site/passe_compose_ejercicios_resueltosuiqqb.pdfIn PDF document text
    • http://podipotekoi.ru/security_supervisor_interview_questionsf4o58.pdfIn PDF document text
    • http://raboleziwuga.iblogger.org/61540180126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453134/normal_5fd77b976fadc.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/Thgfjc5/fruit_bump_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/dham1NL/87047538222.pdfIn PDF document text
    • http://tizezs.xyz/64562290502jq51f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492245/normal_603b6f667834c.pdfIn PDF document text
    • http://naykaryadom.fun/78308844503to0kd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469143/normal_5fded9a4c1992.pdfIn PDF document text
    • https://jasebezaf.weebly.com/uploads/1/3/4/6/134630561/477060.pdfIn PDF document text
    • http://opsnatur.fun/practical_skills_in_chemistry_3rd_editionium6g.pdfIn PDF document text
    • https://cdn.sqhk.co/nisosawero/X86pwuv/gunshot_sound_effect_download_mp3.pdfIn PDF document text
    • http://probnik1313.tech/monge_descriptive_geometrydiihl.pdfIn PDF document text
    • http://help-verification.com/104072383977lo5m.pdfIn PDF document text
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/0d3bdc7f9052d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dijinisefiregot.rf.gd/respiracin_aerobica_y_anaerobica.pdfIn PDF document text
    • http://kurorasi.rf.gd/lenovo_g50-80_memory_upgrade.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_off000110af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AF 5604 bytes
SHA-256: dd0e78ca2a18d5d110154edfa50a541c183bbbcdd89e0503fc4230ab64d984d3
font_01_sfnt_off000123b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B7 11160 bytes
SHA-256: 08788a6c3cb943088982f1440c7784c01b64515e9c2ec554500a2e851a03450d

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