Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d01d89c3fd9d4a…

MALICIOUS

PDF

74.7 KB Created: 2021-04-03 20:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1715b2e1d94c1c2697694c1b46b4ee92 SHA-1: 2c3f8cfc0b149f761d67877b3d0cc8d6ffcfc3c5 SHA-256: 73d01d89c3fd9d4a130071343d9651bb0dfd3f9dc953bc617aa86ebff44ccac1
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. An embedded URI points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://xezojetit.ru/123?utm_term=spider+solitaire+free
    • http://vukosam.22web.org/rutiketapurupezok.pdf
    • http://nodozavi.iblogger.org/33486476921.pdf
    • http://dokelamalide.iblogger.org/fox_sports_2_singapore_tv_guide.pdf
    • http://piter.store/dimedobisabubedovudm2lzr.pdf
    • http://yarrebitteh.online/missing_411_off_the_gridvcsu1.pdf
    • http://accface.in/android_version_samsung_s5_minil4miw.pdf
    • http://zenafek.iblogger.org/axxess_steering_wheel_control_interface_manual.pdf
    • http://pukotuv.22web.org/89639181060.pdf
    • http://salonly.xyz/70833720328mr31u.pdf
    • http://smartradiobf.ru/t-_shirt_design_templates_for_salemvmrc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nerokigonone.rf.gd/27639367024.pdf
    • https://s3.amazonaws.com/joterige/didobinafixazipiwureza.pdf
    • https://s3.amazonaws.com/zetituri/music_marketing_plan_template.pdf
    • http://ratudafoxivux.rf.gd/algebraic_expressions_identities_class_8_worksheets.pdf
    • https://s3.amazonaws.com/lazolu/aplaceformom_employee_reviews.pdf
    • http://wajiletum.epizy.com/lefel.pdf
    • https://s3.amazonaws.com/wofaxil/bhajan_music_apps.pdf
    • https://s3.amazonaws.com/varoximu/blue_color_wallpaper_android.pdf
    • https://s3.amazonaws.com/gafedupeba/driving_license_exam_questions_and_answers.pdf
    • https://s3.amazonaws.com/viwoxuz/97297591405.pdf
    • https://s3.amazonaws.com/tosego/gitabubinodakajudesezo.pdf
    • http://dizakopalelur.epizy.com/bittorrent_er_for_windows_10.pdf
    • http://finuzajobozosom.epizy.com/how_do_you_take_apart_a_dyson_dc58.pdf
    • https://s3.amazonaws.com/divexikav/utilitech_outdoor_2-outlet_timer_instructions.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_off0000e92d.bin
9bb5cc1a521f5c3c443e11fae53b4eced2f98a0770317f4d21c8a72217700852		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE92D 5136 bytes
font_01_sfnt_off0000faaf.bin
ff54f14ef704ba41383c135fa3b2a5db53becb2a5d7c735f9fee877b13b0df69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 10164 bytes

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