Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f940420e783b81…

MALICIOUS

PDF

88.6 KB Created: 2021-03-24 01:21:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52a3d42f045965993a761e33663e4a3f SHA-1: d0c87252e23e166a2b8c1aab4300cabc76da3ca3 SHA-256: 03f940420e783b8125d352e9fdca325c151f89ee383a1b5f8af7430a3e440b89
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers. The 'SE_CLICKFIX' heuristic indicates social engineering by instructing the user to run a command, likely to download a payload from the embedded URL 'https://midufefew.ru/wix?keyword=movie+hd+apk+for+firestick'. This suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://midufefew.ru/wix?keyword=movie+hd+apk+for+firestick
    • https://cdn.sqhk.co/xufatirumina/hhfHW1j/rigorowenarutefagegi.pdf
    • https://cdn.sqhk.co/fodexuxefeba/iajiZ6V/78690712482.pdf
    • http://fevevafo.medianewsonline.com/nunca_foi_sorte_adriana_sant_anna_download.pdf
    • http://nanamojuvimujo.medianewsonline.com/latogekaferesumefo.pdf
    • http://remoliwagofaju.mywebcommunity.org/hal_varian_advanced_microeconomics.pdf
    • http://vetebozo.mypressonline.com/technical_analysis_for_dummies_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b3f842c6-d557-4ee1-a354-3e85cfc82ba5/quantum_memory_power_audiobook.pdf
    • https://uploads.strikinglycdn.com/files/7971cc4b-ce0e-4dac-93a6-d8528b9bca48/86868674283.pdf
    • https://uploads.strikinglycdn.com/files/f5a58fcb-e485-4f31-83ea-053ffd642720/cortisone_shot_shoulder_pain.pdf
    • https://s3.amazonaws.com/xeruxaxer/78975979604.pdf
    • https://s3.amazonaws.com/zevutebulaworel/bihar_tet_application_form_2020.pdf
    • https://uploads.strikinglycdn.com/files/0527ac4e-263b-4e76-99e2-9d134c52b1c2/gimezavuvojuf.pdf
    • https://s3.amazonaws.com/tometubufimopim/caverns_cauldrons_and_concealed_creatures.pdf
    • https://s3.amazonaws.com/ronatiduzoxij/70224510563.pdf
    • https://s3.amazonaws.com/wetevali/madapokutureposazopu.pdf
    • https://uploads.strikinglycdn.com/files/f7bd1aa5-2efa-4e98-9ecc-aa15cee3cb41/nursing_scope_and_standards_of_practice_3rd_edition.pdf
    • https://uploads.strikinglycdn.com/files/5c304d58-d908-4fa7-9ce7-e73e0b8dfd96/how_to_port_my_number_to_verizon_prepaid.pdf
    • https://uploads.strikinglycdn.com/files/fc740b53-0632-46c8-bf1c-078cba77b3f1/what_is_the_importance_of_statistics_and_probability_in_our_daily_life.pdf
    • https://s3.amazonaws.com/mevuzokekenojab/jakokisisopi.pdf
    • https://s3.amazonaws.com/vovuzize/fuel_expense_excel_template.pdf
    • https://s3.amazonaws.com/vavapekadoliti/vepevonofowimabajakut.pdf
    • https://uploads.strikinglycdn.com/files/467b5840-aace-4af2-9a38-53c8115a935c/why_books_were_banned_in_fahrenheit_451.pdf
    • https://s3.amazonaws.com/bovenotojitowe/68735763426.pdf
    • https://s3.amazonaws.com/daraniwekamidir/samsung_washing_machine_not_spinning_dry.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109ff.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109FF 6744 bytes
font_01_sfnt_off00011ae4.bin
2d660bc15ed089a22efdbcd4751c9090d464bf31b1e856bd11a6e0ffe05eec88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE4 5340 bytes
font_02_sfnt_off00012d1f.bin
b21d862c8f6855e7e8fdb9a95a842b03f814838cf59f2eecea0b5aedde50471e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1F 11668 bytes

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