Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea6eb2913c67c2d…

MALICIOUS

PDF

88.9 KB Created: 2021-04-22 08:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25223e88176f275488896297bb78e53b SHA-1: d885f15f59b359ea7bebba1443502dfcc484d3ec SHA-256: 4ea6eb2913c67c2df072d9f4667a12abc8bc367da08754ef4eaa806b2c4aa64c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=how+to+download+tux+paint+in+ubuntu
    • https://static.s123-cdn-static.com/uploads/4451561/normal_5fe5ec07965e7.pdf
    • https://cdn.sqhk.co/rifelefiw/yidrgdW/mobile_wallet_digital_payments.pdf
    • https://cdn-cms.f-static.net/uploads/4450148/normal_5fd8171ccc4f7.pdf
    • https://cdn.sqhk.co/temirikuji/GVPhehf/download_rise_up_lyrics_by_andra_day.pdf
    • https://static.s123-cdn-static.com/uploads/4380674/normal_5fdf283e08bcf.pdf
    • http://vodizurulenega.mypressonline.com/dijigafutelopir.pdf
    • https://cdn-cms.f-static.net/uploads/4484815/normal_6028adf24ab17.pdf
    • http://temppicture.xyz/report_citation_apa_6thvqvje.pdf
    • http://siteznakomstv69.space/relieving_letter_format_in_word_freeojwit.pdf
    • http://kittyplay.online/how_to_draw_a_leo_signvi0rh.pdf
    • http://helpcenterbusiness.xyz/75235740392dc34t.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zaduzos.myartsonline.com/definition_of_business_research.pdf
    • http://sopexalibip.onlinewebshop.net/19090788289.pdf
    • https://s3.amazonaws.com/jopomodilamego/kitchenaid_pro_600_6-qt_bowl_lift_stand_mixer.pdf
    • https://s3.amazonaws.com/zemigiduwagafu/facebook_3._1_emoji.pdf
    • https://d1ced4a1-fa29-4c66-b583-77209f32159a.filesusr.com/ugd/c88d8b_49c2059796d94e6684b6d2da391de8b8.pdf?index=true
    • https://s3.amazonaws.com/gimufesajo/selenium_webdriver_3_practical_guide_download.pdf
    • https://s3.amazonaws.com/bezorito/harry_potter_lego_castle_6020_pieces.pdf
    • http://falariwupap.myartsonline.com/graphic_novels_online.pdf
    • https://bee08bb6-d8c1-4cc5-89f0-d6ac88a4f64a.filesusr.com/ugd/8b8a1f_6769d0fc94ce44939f00fc2d78b92fae.pdf?index=true
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_e23438312311482f9b8b934f79b6a566.pdf?index=true
    • https://s3.amazonaws.com/tokit/10516296524.pdf
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_c153d71b4f5d4c848c2d0162129a7749.pdf?index=true
    • http://vobozezojip.onlinewebshop.net/diagnstico_laboratorial_da_anemia_falciforme.pdf
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_2cdea43a74954ba48a50cd1d0e0e795e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001197e.bin
9d7d654bbed003769e5faca8747dafef52fb7beb2c019c0ec5e9e2e07fbd005d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1197E 4940 bytes
font_01_sfnt_off00012a6b.bin
cf96ed57e58fb30697b5abc5cbb54d70f3e44a10138b9f5d840fe8264c8d8d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6B 13580 bytes

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