Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92046ce685f31e2…

MALICIOUS

PDF

168.3 KB Created: 2021-03-21 03:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39a0f8609907764f5c6baa846f4fd963 SHA-1: 2ad495c37a9ddb8e339fab2d0f6c481c31e5f18d SHA-256: b92046ce685f31e28ba0986a122002f9fcf2b1a0d47d5ea78eea58fb7b4bcd49
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'lepidoptera moths and butterflies pdf', likely intended to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=lepidoptera+moths+and+butterflies+pdf
    • https://cdn.sqhk.co/nogorodizet/i9sJuZA/germ_smash_hits_song_list.pdf
    • https://cdn.sqhk.co/gefimiwotux/bhdBygg/soccer_football_prediction_statistics_bet.pdf
    • https://ramageputa.weebly.com/uploads/1/3/1/6/131637054/bixuwifelaz.pdf
    • https://cdn.sqhk.co/navotezive/uAjjggJ/best_travel_guide_book_for_new_york_city.pdf
    • http://womirewuzakuf.sportsontheweb.net/wemixejon.pdf
    • https://cdn.sqhk.co/xegogeji/QicgiTL/40529897442.pdf
    • https://safejabev.weebly.com/uploads/1/3/0/7/130739713/c3fd7.pdf
    • https://revijokatise.weebly.com/uploads/1/3/3/9/133999222/jezipiserarimekiva.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://eeeff038-21f9-42a6-bde0-cd945221d618.filesusr.com/ugd/9dc459_69e5ee44f5e84255a169cd91da457fc7.pdf?index=true
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_0e6b855ddab0472c93de37f982cd5c06.pdf?index=true
    • https://s3.amazonaws.com/sebunuzu/86518212706.pdf
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_eacd64d50c824921a273f59c46bf0e1d.pdf?index=true
    • http://merowijesajov.epizy.com/48979076860.pdf
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_568dcdfa695c4289b5268bc092ea7717.pdf?index=true
    • http://rijemow.onlinewebshop.net/85350010486.pdf
    • http://wepaxilex.epizy.com/xemozabinovegufusok.pdf
    • https://edcb5511-827b-40b0-97c1-3499c313f96b.filesusr.com/ugd/0779a3_0b52cbb61138480fb2b51d2b4ee5f219.pdf?index=true
    • https://s3.amazonaws.com/xeropizuwe/brindisi_report_san_pietro_vernotico_oggi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023f9a.bin
27aa0898ae525a2ce8f097f8296c0055abd7073577ece5915a2e8d56158b1ebb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23F9A 5364 bytes
font_01_sfnt_off0002519c.bin
7775e8e7c4329a1c5bd112c001158d8940360085fc48f9208aadc231de0e3d90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2519C 1716 bytes
font_02_sfnt_off00025a43.bin
5cdf2dfb4bd7b96c9bd1edb31906960dcaa8d05580b5796d8289ac299013ecb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25A43 18256 bytes

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