Malicious PDF — malware analysis report

Static analysis result for SHA-256 5648357bc84c891f…

MALICIOUS

PDF

82.7 KB Created: 2021-05-06 17:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbb641e8f1fe5a75223970134feb2584 SHA-1: 552e6c9cbb6742031903ec903080023a876a999c SHA-256: 5648357bc84c891fffa92df4e12bbf49a697140ef4f367816bf91d21697df927
104 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF_URI heuristic pointing to a suspicious URL, coupled with a 'download button' heuristic, suggests a phishing lure designed to trick users into downloading a payload. While no scripts were explicitly extracted, the PDF structure and embedded URLs are strong indicators of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/strik?utm_term=is+there+a+free+spanish+translation+app
    • http://jekeluxuto.mywebcommunity.org/pals_park_chipley_fl.pdf
    • https://cdn-cms.f-static.net/uploads/4445558/normal_6016bb1c17220.pdf
    • http://jetavof.sportsontheweb.net/mechanical_drawing_symbols_chart.pdf
    • http://xapidomin.mywebcommunity.org/cell_organelles_and_functions.pdf
    • https://cdn.sqhk.co/resesexiraf/jbuXJea/dungeon_keeper_amiga.pdf
    • https://cdn.sqhk.co/gimanoretev/jys9dhe/funny_horror_game_youtubers.pdf
    • https://cdn.sqhk.co/lepavenujal/oiNc5hf/91470311882.pdf
    • http://lojapidabud.mypressonline.com/cub_scouts_bear_handbook.pdf
    • https://cdn-cms.f-static.net/uploads/4470826/normal_602e784327901.pdf
    • https://static.s123-cdn-static.com/uploads/4367951/normal_5fffc123200a0.pdf
    • https://cdn-cms.f-static.net/uploads/4488137/normal_5fea394a633eb.pdf
    • http://kelimap.mywebcommunity.org/botany_for_degree_students_pteridophyta.pdf
    • https://static.s123-cdn-static.com/uploads/4375705/normal_5fe3bad2330fd.pdf
    • https://cdn.sqhk.co/fusuwudofal/kdHcHq7/kelafapik.pdf
    • https://cdn.sqhk.co/lululitoj/hg67zgh/kukideweb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nitajosasa/managerial_challenges_of_management_information_system.pdf
    • https://uploads.strikinglycdn.com/files/1b98a5bc-2fdb-4b82-a4f2-1a521b289a44/15837496184.pdf
    • https://s3.amazonaws.com/bezorito/attractive_splash_screen_in_android_github.pdf
    • https://3df016ad-b40f-424f-9918-b96c60f46212.filesusr.com/ugd/387bfe_bf9e7fa51c934cdb9295ebd42c5c5281.pdf?index=true
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_509267a11b5f45f386a0ca2b328636d1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9b123bd5-4173-41fa-8301-721bab166d88/jebaledomogonibazije.pdf
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_d3ac7d74d8494a73ae4e25716c140d9d.pdf?index=true
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_5153b46b4d4e473abb70653f5c95bcb3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/457017d5-c29b-4908-ac71-b028498684c0/22810592528.pdf
    • https://uploads.strikinglycdn.com/files/9357b136-1361-4ad7-8543-7d477a65d92c/486230032.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010618.bin
834ff5e48fddfdf74e59a8c05cdb1cba795128d459b9537fbd12d16adf3856d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10618 4924 bytes
font_01_sfnt_off000116d2.bin
981d8a5163d3d5f4b76ee0dfc7fd11e23734f99e3c559c74dd179fe5fc4d0cf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116D2 11288 bytes

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