Malicious PDF — malware analysis report

Static analysis result for SHA-256 5446156ee011c0cb…

MALICIOUS

PDF

90.1 KB Created: 2021-02-25 04:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 28d39c284f99d511334bd0515cf5427f SHA-1: 90afc9a6c628814910b9f8d51d2475ab98ec79b8 SHA-256: 5446156ee011c0cbb9932af292e65a30bbfa870390bf96f659c914e99c103d0d
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of a link farm designed to improve search engine rankings. One prominent URL, 'https://maypoin.ru/wix?keyword=minecraft+hacked+unblocked', suggests a lure related to popular online games to attract users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wix?keyword=minecraft+hacked+unblocked PDF link annotation
    • https://wadamosemexijep.weebly.com/uploads/1/3/4/4/134434227/37404fd19.pdfIn PDF document text
    • https://cdn.sqhk.co/zozimevoket/jx5Bham/5e_companion_app_multiclass.pdfIn PDF document text
    • https://dowisapi.weebly.com/uploads/1/3/4/2/134266119/7068386.pdfIn PDF document text
    • https://cdn.sqhk.co/kanojasav/gRjhy1x/tixituwiriloxipetibifora.pdfIn PDF document text
    • https://wavenugila.weebly.com/uploads/1/3/4/8/134852162/jorawik.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/IhaigRz/mp3_voice_recorder_for_windows_10.pdfIn PDF document text
    • https://roxuxafuz.weebly.com/uploads/1/3/0/8/130813852/wukize.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/7JY5Pc8/vertical_jump_training_shoes.pdfIn PDF document text
    • https://cdn.sqhk.co/papebikuwi/dKhhqPO/super_stickman_heroes_mod_apk_unlimited_money.pdfIn PDF document text
    • https://vuxilimibipemop.weebly.com/uploads/1/3/1/4/131453056/soxesefeda.pdfIn PDF document text
    • https://cdn.sqhk.co/lutumodigi/JThehia/fozudubiko.pdfIn PDF document text
    • https://gakafapokizi.weebly.com/uploads/1/3/5/3/135319358/62a0b99fef7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gewisetug/zapasalamogozi.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/yesu_we_ambassadors_of_christ_choir.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/ludaxafulesuj.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/mazusazikedexekuzax.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/45056186177.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CA 5024 bytes
SHA-256: f91b4ad2be7bef0a2492ac16da5f0153c51b7c247d8cc0f951aa6b60f3e1f8e3
font_01_sfnt_off0000f7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BD 8688 bytes
SHA-256: e7a822f576d108b1cf2d7b8f34ee7951859031a9432289776591b6c5a9ae1de8
font_02_sfnt_off0001128a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128A 10916 bytes
SHA-256: ef6fe85e8df81305ecc753bdda6a387f62ee1720f0501ea1a55befd06b415480
font_03_sfnt_off00013808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13808 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940
font_04_sfnt_off00014c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C71 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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