Malicious PDF — malware analysis report

Static analysis result for SHA-256 456b6e2ebf8beafb…

MALICIOUS

PDF

70.5 KB Created: 2021-04-06 15:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f06d3b512963fdac9b0655f9cb1fe06 SHA-1: 5134a6027a6af6e8899c435a41db5366ac6389e3 SHA-256: 456b6e2ebf8beafbc9b639d888bb256e492f3b97993f8c8f7d870ec3b67ec0d9
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The embedded URL suggests a lure for users to download a PDF, likely containing an exploit. The document body, though heavily obfuscated, contains references to 'award' and 'pdf gratuit', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/award?keyword=alter+ego+2+pdf+gratuit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451229/normal_60351ccc5f0b5.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/ic9idii/adidas_uefa_champions_league_football_2020.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/hallelujah_sheet_music_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425238/normal_600897898c229.pdfIn PDF document text
    • https://cdn.sqhk.co/femolilepob/hhgiFml/spiderwick_chronicles_2.pdfIn PDF document text
    • http://mesikigodijope.mypressonline.com/amplifier_circuit_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473062/normal_5fcf2468538e1.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/welaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371790/normal_6002743b91608.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387037/normal_5ff92e054b168.pdfIn PDF document text
    • https://cdn.sqhk.co/riluvexudeve/if8QZii/15558682004.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/larson_algebra_2_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491965/normal_5ffeff71de2a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490929/normal_5fefc87b82492.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413345/normal_5fcf858637193.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/fYAPqG7/cute_octopus_drawing_step_by_step.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juzefabamurever.rf.gd/95165448219.pdfIn PDF document text
    • http://pitaken.onlinewebshop.net/neoliberalisme_dalam_hubungan_internasional.pdfIn PDF document text
    • http://jomovexujufadi.epizy.com/89953349817.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d39b.bin
f0161dafe3482d42312590cd519c2572107d432bf6d3231c2ee866bfa187fb33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD39B 5152 bytes
font_01_sfnt_off0000e53d.bin
f53b4d40c745260c76a6265b29364a0f5f60a987a336bbf5adc6c4c11a8086c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE53D 11828 bytes

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