Malicious PDF — malware analysis report

Static analysis result for SHA-256 2011e13519024ab7…

MALICIOUS

PDF

78.5 KB Created: 2021-03-22 02:07:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 58080d0e39791dbf1a0e08146f252279 SHA-1: f67e5b8fbdf06187cb4b72db39c029cdfd0aec66 SHA-256: 2011e13519024ab7a08ec10a08678ce9c4b8d851d32f2767dd591dad2000e3ed
104 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of an external URI pointing to 'nipisod.ru' and a visual download button lure suggests a phishing attempt. Although no scripts were explicitly extracted, the PDF structure and the ML detection indicate it's designed to trick users into downloading a malicious payload.

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://nipisod.ru/123?utm_term=synology+assistant+for+mac PDF link annotation
    • http://deromgroup.com/william_sonoma_bread_machine_instructions_ws_109488tfu.pdfIn PDF document text
    • https://forugizatufuru.weebly.com/uploads/1/3/1/4/131410167/3385229.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365642/normal_5fddf84ec0f7e.pdfIn PDF document text
    • http://tiktoktop.design/donekogif3s18z.pdfIn PDF document text
    • https://ponozivodu.weebly.com/uploads/1/3/0/7/130775347/bapuxumeza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455195/normal_601afa15a83f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_6024a6e89eebf.pdfIn PDF document text
    • http://znakomstva69.space/elite_platinum_2.1_qt_air_fryer_manualr3rcn.pdfIn PDF document text
    • http://ttop-shop.com/chilled_water_coil_performance_curvetmqcm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465559/normal_6057d0439c762.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489440/normal_5ffa803f21802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_6057cb43c7f3d.pdfIn PDF document text
    • https://jumufewaxijakuk.weebly.com/uploads/1/3/1/3/131380308/nolazetofaxe-vufupu-lulonetaxarujin-dezumuporugozeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_604ca6830779e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/ingilizce_zt_anlaml_kelimeler_ve_trkeleri.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/serologia_forense.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/wukilosomawepobozodagav.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/android_auto_update_2019_rav4.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/41951448143.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_off0000e62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62C 4404 bytes
SHA-256: 045fc56b0ec5542cf791ffe3c45a711ed1f48d9f713213a0144c52f1c60c3ff8
font_01_sfnt_off0000f5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B7 5404 bytes
SHA-256: 1c20b1a1d8832a8fd8716afcf5d6f0c5538558a1a7dbda1338fe065d03a01c64
font_02_sfnt_off00010811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10811 10928 bytes
SHA-256: 3fbd379cc91c1c687a40a35686cf7b1906848ecf2b8cf485eccbee7b5d8de47d

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