Malicious PDF — malware analysis report

Static analysis result for SHA-256 e100ce7c9da60b75…

MALICIOUS

PDF

83.7 KB Created: 2021-02-18 00:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: eba2de9e071b0bdf732f0f3710ecc429 SHA-1: bf283ecda3953b1290d04c0652cda13b8a5bf7bd SHA-256: e100ce7c9da60b753bf9ab22c44130ffdb73ff82f2eec117029e443a72db4321
134 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including a link farm on disposable hosting, suggests an attempt to distribute further malicious content or phish users. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=physical+anthropology+lab+manual+pdf PDF link annotation
    • https://kekageguva.weebly.com/uploads/1/3/0/7/130776826/bepilunonobazas_dajimafabe_gikukarinaxu.pdfIn PDF document text
    • https://guzaluvezitalil.weebly.com/uploads/1/3/4/6/134645516/239003.pdfIn PDF document text
    • http://tasunixupowife.66ghz.com/ragobesiliretunemujivusu.pdfIn PDF document text
    • https://tetoferapijala.weebly.com/uploads/1/3/1/6/131606168/4385355.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/aBhhWig/warhammer_40_000_regicide_mod_apk.pdfIn PDF document text
    • https://segamivudafipem.weebly.com/uploads/1/3/2/7/132740242/lubak-gibixisodemi.pdfIn PDF document text
    • https://ponirusorigimo.weebly.com/uploads/1/3/0/7/130738629/f3d0a5b2e99f867.pdfIn PDF document text
    • https://lotatodekimin.weebly.com/uploads/1/3/4/7/134705716/ginal_lejelub_resaneg.pdfIn PDF document text
    • https://cdn.sqhk.co/nedovipirumu/Pghnghn/cut_the_rope_2_game_download_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/nhdNjda/47988631558.pdfIn PDF document text
    • https://cdn.sqhk.co/kapokosop/gcxjmYE/update_ios_12_ipad_mini_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lofetumavigasi.epizy.com/41315196466.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/bleak_falls_barrow_puzzle_2_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/a_muralha_filme.pdfIn PDF document text
    • http://kibulirol.rf.gd/pefesupekomepalu.pdfIn PDF document text
    • http://surigel.rf.gd/l_t_hydrocarbon_annual_report_2018.pdfIn PDF document text
    • http://sivakekixil.epizy.com/64945068678.pdfIn PDF document text
    • http://bivoxubi.epizy.com/66689029519.pdfIn PDF document text
    • http://katewamopexo.rf.gd/adventure_tourism_ralf_buckley.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB6 5576 bytes
SHA-256: 7fed7ef42fc2f4218e54602d3b86e60d87be69fd66cc0ed77146feb3af43e9d6
font_01_sfnt_off00010e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E68 10736 bytes
SHA-256: 2dcfe2501e7b483825b7db7ddf9f39b7378cd9304fbbba33bd8ef2952adfeff4
font_02_sfnt_off00013329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13329 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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