Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22a5b8abcdec210…

MALICIOUS

PDF

76.4 KB Created: 2021-02-11 15:24:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8871e9b8fc89334c534a7b71b6c5938e SHA-1: 547349bb5a85dcc7213fbadcea621e9bad46e642 SHA-256: b22a5b8abcdec210d415b7fadd96139883be4f02d4049badc03b011d335e6508
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that mimics a search result for a specific book, likely to trick users into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://druttle.ru/wix?keyword=drugs+society+and+human+behavior+17th+edition+pdf+free+download
    • http://chambrehub.xyz/zujike1jwjv.pdf
    • http://onesmall.space/airframe_and_powerplant_study_guideisrz3.pdf
    • http://taher-tcac.com/indofood_agri_annual_report_2017xwm7a.pdf
    • http://7gusevshop.website/krane_modern_physics_solutionsnb5a6.pdf
    • http://rubyshup.space/aldershot_weather_reportooja1.pdf
    • http://creditpm.com/ingenieria_economica_blank_tarquin_6ta_ediciona8joz.pdf
    • http://mif-smeh.space/pesigemavirunuzakemevevoyrkl1.pdf
    • http://maxist.ru/slogan_logo_quiz_answer_level_101-_1209i3ar.pdf
    • http://batmbatm.ru/l_alphabet_militaire24059.pdf
    • http://shopsmmv.site/absolute_java_4th_editionkhl6j.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gorefoverotiw.epizy.com/bosch_aquatak_100_plus_user_manual.pdf
    • https://s3.amazonaws.com/vufupu/50215344651.pdf
    • http://sonevovavar.rf.gd/audiosurf_free_pc.pdf
    • http://bubewap.rf.gd/chromateq_pro_dmx_software.pdf
    • http://lavuradisaxel.epizy.com/zuxokofosevir.pdf
    • http://rigirulame.epizy.com/97602790200.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_off0000ea94.bin
45edd088cb34e8c6ba67d0572520da21854fded540b64bb843653d37adc69802		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA94 6092 bytes
font_01_sfnt_off0000ff55.bin
9f7aefdbd88f168e8ff4a0ff1f84e60f2d72b233e1d7a643ab4225af5dcc8884		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 10780 bytes

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