Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d91a11c4a3778c…

MALICIOUS

PDF

74.1 KB Created: 2021-04-05 19:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 184e5fc4ac37ab8138cb848b65e06f4a SHA-1: f8d599f95a726e462230cec8a3e2cd0ceedb58cf SHA-256: 49d91a11c4a3778cba6f6e842552be16125046f4f17517601e257911d1215c28
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating phishing and Trojan characteristics. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/123?utm_term=vespa+px200e+manual
    • http://woviregawafokal.22web.org/xetelujaxaza.pdf
    • https://cdn.sqhk.co/kipafipigifi/f14Z8y3/98873771728.pdf
    • https://cdn.sqhk.co/rorajakura/Hghhjjh/app_music_mp3_download_free_copyleft.pdf
    • https://cdn-cms.f-static.net/uploads/4444123/normal_60473a4c81e54.pdf
    • http://jaralet.getenjoyment.net/60925941226.pdf
    • https://cdn.sqhk.co/zikegasenar/eddz1gc/share_files_via_icloud.pdf
    • https://cdn.sqhk.co/pekotegafod/jagdOG4/online_slots_casino_bonus.pdf
    • https://cdn-cms.f-static.net/uploads/4383567/normal_5fd929aed0e07.pdf
    • http://fodamibokaf.66ghz.com/ugly_alert_sub_indonesia.pdf
    • https://cdn.sqhk.co/verexoleki/cjghjL6/russia_s_victory_day_parade_2019_best_moments.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kipadijosepo.epizy.com/handball_bundesliga_spielplan_18_19.pdf
    • http://tupuxiges.epizy.com/86297963956.pdf
    • http://gefilodeza.myartsonline.com/verenulinadalazebekazizub.pdf
    • https://uploads.strikinglycdn.com/files/cf240ea0-08d8-4a81-9061-c4f507248366/95685848504.pdf
    • https://uploads.strikinglycdn.com/files/e0874c44-2bce-405a-9481-2a8874fce410/50499512169.pdf
    • http://lamekukibudinos.epizy.com/best_to_word_doc_converter.pdf
    • http://mozolawaguj.epizy.com/lakojerafimikavitasoxan.pdf
    • http://rujunigowe.epizy.com/chuyn_i_sang_word_hnh_nh.pdf
    • https://uploads.strikinglycdn.com/files/ca88208c-0a6a-454b-8598-937e8dfd871d/zitalavujuvonovak.pdf
    • https://uploads.strikinglycdn.com/files/99bddc4b-2573-4151-a392-8e45ccf80b15/how_many_parents_read_bedtime_stories.pdf
    • https://uploads.strikinglycdn.com/files/3ddbb2c5-3982-4416-b1be-e898d7d243b2/stock_market_trading_guide_for_beginners.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_off0000d8f4.bin
dd23be7009bda6ac245ef70991f32ea905172c289235f4784c96e537e85cfba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F4 4820 bytes
font_01_sfnt_off0000e938.bin
c9aa576a8f3014b0978c5a74f393a78e53bbed50425e8eeb7b2aa7bdaefd4f77		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE938 10932 bytes
font_02_sfnt_off00010d7c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7C 4324 bytes

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