Malicious PDF — malware analysis report

Static analysis result for SHA-256 914bb580343f3611…

MALICIOUS

PDF

85.2 KB Created: 2021-03-29 10:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd77e752fb21430f8693ac768303e7e1 SHA-1: d5cdc5d415ecfd5231510cfd7c54c57a5cb5f4e1 SHA-256: 914bb580343f361115cefca5b40db4ac5e3e1f229080ab994e82b3457aac5ced
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 high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'score sheet'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/wix?keyword=cdl+skill+test+score+sheet
    • http://tifusanesewo.22web.org/simple_spreadsheet_app_for_android.pdf
    • http://topsalon.xyz/cub_scout_sign_in_sheetuaqaq.pdf
    • http://contact-git.top/why_my_mobile_hotspot_is_not_showing_in_other_devicesln2y1.pdf
    • https://futafapegimato.weebly.com/uploads/1/3/1/8/131855997/xusasile-tosemumadoko-tekov.pdf
    • https://xizuxikeg.weebly.com/uploads/1/3/0/7/130740292/juvikuzizapu-witevilom-dakasefuwise.pdf
    • http://igclienteam.com/53652285952bt57l.pdf
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/3749954.pdf
    • https://cdn-cms.f-static.net/uploads/4448103/normal_60507efe6983a.pdf
    • https://static.s123-cdn-static.com/uploads/4384642/normal_6004a0ff6a2c0.pdf
    • https://cdn-cms.f-static.net/uploads/4424024/normal_6052d9bfd510b.pdf
    • https://cdn-cms.f-static.net/uploads/4461485/normal_60610d2e40340.pdf
    • http://ketotreno.buzz/boxokimuq2qqk.pdf
    • https://cdn-cms.f-static.net/uploads/4460230/normal_5fd23348bf446.pdf
    • http://fasad-dom.site/emulsion_biphasic_liquid_dosage_form5fxfm.pdf
    • http://petersikdar.com/shoot_em_up_full_movie_download_filmyzillao1vze.pdf
    • http://tronreserve.online/best_android_phone_under_400_australia_2018cyuls.pdf
    • http://podjem2.club/kerlink_wirnet_station_datasheetsgowp.pdf
    • http://idealicaufficiale.website/nespresso_inissia_instruction_manual91mia.pdf
    • http://beautysss.site/2310776873594dp5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://luzuzapubovug.rf.gd/quality_management_systems_software_development.pdf
    • https://s3.amazonaws.com/nitajosasa/poulan_pro_snow_blower_user_manual.pdf
    • https://s3.amazonaws.com/kawotexulozax/atlantic_fleet_ship_mods.pdf
    • https://s3.amazonaws.com/lewuli/virtex_7_ultrascale_datasheet.pdf
    • https://s3.amazonaws.com/dusubonifu/bugizasuboxijenur.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_off000111a8.bin
7f08c879f271a5203107d52332b7fbe0e95722a82033f89fb5bcf324d8e73e7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x111A8 4788 bytes
font_01_sfnt_off000121e4.bin
da668301b767a302c492c32df02783a140b3067003dda6d814e0b5738ea87f6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x121E4 10932 bytes