Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d617ae92a186205…

MALICIOUS

PDF

74.8 KB Created: 2021-04-07 14:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 651ba75f1c0e215ad2e2ceb19ff58f41 SHA-1: a849261d3e10cf14ad35eab6bc530f6176e52538 SHA-256: 9d617ae92a186205f452c95b60d07ca00bea1e1b26e9eb9579e411fca2bef570
104 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a secondary payload. The document body, though heavily obfuscated, suggests a lure related to IELTS writing tests, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/123?utm_term=answer+sheet+ielts+writing+idp
    • http://mimivudarevi.scienceontheweb.net/87529654501.pdf
    • http://bagawixaj.mywebcommunity.org/pdf_small_size_converter_download.pdf
    • https://cdn.sqhk.co/sipebesoxu/gjpcJjg/tozogivubimafoduvoge.pdf
    • https://cdn.sqhk.co/fimegasaz/4geighb/guilty_crown_season_2_plot.pdf
    • http://nusezuretoti.scienceontheweb.net/resumen_el_principe_de_la_niebla_corto.pdf
    • http://zitarekatinupas.sportsontheweb.net/cricket_game_rules_and_regulations.pdf
    • http://kigumelez.medianewsonline.com/ashrae_hvac_systems_and_equipment.pdf
    • http://mujabelor.mywebcommunity.org/39539323748.pdf
    • https://cdn.sqhk.co/boduzapun/bgjieSy/40400512142.pdf
    • http://zanovekolasin.mywebcommunity.org/what_does_firmament_mean_biblically.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/0b0b07b6-ad92-4de9-9fb8-4eb9a91fb729/how_do_you_set_the_time_on_a_samsung_microwave.pdf
    • https://s3.amazonaws.com/jivamubug/airplane_simulator_2019_apk.pdf
    • https://uploads.strikinglycdn.com/files/b25090cb-3851-400e-9b40-cdffad98e58a/68287707753.pdf
    • https://s3.amazonaws.com/vovuzize/gosunugixodej.pdf
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_2b1a30eaab99456c926e82cb94fed0e9.pdf?index=true
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_7d45b601f5de4bc4b232e806eb32d57f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/61a4e6f4-5fe0-4772-876f-c38fbda08384/xenalulufatexajibola.pdf
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_89fb347df24940e6a17e4212a35c38de.pdf?index=true
    • https://58f604bd-1fd8-4cfe-af9b-f15e67d030d5.filesusr.com/ugd/9a7439_cdd0c9c73aee41f68225235aae4ded8e.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db92.bin
9983be5bce0610d2b2b51ca70a6a6f6eb4210397ed69eaa0a39fa7dca65e3918		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB92 4768 bytes
font_01_sfnt_off0000ebc6.bin
8a73af6040a88d3a3064bf9d2064ba36b7f16249c1eaa68d302e078de2ab2404		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC6 10648 bytes
font_02_sfnt_off00010ff0.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF0 4324 bytes

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