Malicious PDF — malware analysis report

Static analysis result for SHA-256 459037bad6b53400…

MALICIOUS

PDF

72.5 KB Created: 2021-02-12 16:03:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51c6bae95acc0ba8c8c76106cbd1be24 SHA-1: 43edac681306f12b9077dc346d6869a7627d23e3 SHA-256: 459037bad6b53400fded3ba8683b03c646c9a9bf6dc9285aea00e6f8a5a0e30d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'uno mod apk android' and the authoring application 'wkhtmltopdf', suggesting a lure for potentially unwanted software or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=uno+mod+apk+android
    • http://com-copyrighit.com/brother_song_status_videog8954.pdf
    • http://bbflowers.net/norekevubupas6ykx.pdf
    • https://cdn.sqhk.co/mikedeto/hbn8iaV/wormate._io_hack_download_apk.pdf
    • https://cdn.sqhk.co/xefilelo/Wz5hi93/mowixazuviduzosasaxivovep.pdf
    • https://kusezobovezuzeg.weebly.com/uploads/1/3/4/6/134689385/db670b91.pdf
    • https://static.s123-cdn-static.com/uploads/4454435/normal_5fc87cc5b7f92.pdf
    • https://static.s123-cdn-static.com/uploads/4473384/normal_5fccd72fc84ad.pdf
    • https://vitukotegow.weebly.com/uploads/1/3/0/7/130775282/ff71f421f49.pdf
    • https://lonawojalokofa.weebly.com/uploads/1/3/1/3/131382346/c739667.pdf
    • http://canonsburglake.com/46087307801id92z.pdf
    • https://vufepuxo.weebly.com/uploads/1/3/4/5/134522835/xepazi-bexavawerenokel.pdf
    • https://cdn.sqhk.co/xojelumegasi/agdvol9/batavomipag.pdf
    • http://naturka.space/youtube_interstellar_soundtrack_no_time_for_cautionisjms.pdf
    • http://helpcenterbusiness.xyz/project_management_case_study_and_answers0v0ja.pdf
    • https://muxiduxipa.weebly.com/uploads/1/3/5/3/135319221/jipadalu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lofese/bisaya_tagalog_english_dictionary_free.pdf
    • https://s3.amazonaws.com/fojaxexino/avg_antivirus_pro_latest_version_apk.pdf
    • https://s3.amazonaws.com/tesasubawalozan/gaurav_agarwal_mains_answer_sheet.pdf
    • https://s3.amazonaws.com/muwemivumazulax/angielski_matura_podstawowa_gramatyka_wiczenia.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_off0000dcdd.bin
7c8a972958d114e3bc55b4691e248d669d0b37c10642de9986f01cf0406bd0f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDD 4952 bytes
font_01_sfnt_off0000ed9f.bin
06ba2dd942cc73f1e212b7e9ffd829a24904d79fcc2bcdfa7dfaab54ec95bad8
pdf-font-stream PDF embedded font (sfnt) at offset 0xED9F 11308 bytes