Malicious PDF — malware analysis report

Static analysis result for SHA-256 caef9aa081e00793…

MALICIOUS

PDF

72.4 KB Created: 2021-01-18 23:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: faed87af4122c27e4af09239caf74694 SHA-1: 7e5c4c9bacab0a246f7b2222fdf351f174ab56c5 SHA-256: caef9aa081e00793dac3f81441a038caca26a24052ee6077cafbbda71f8dc132
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain metadata related to a product comparison, suggesting a lure to disguise the malicious intent of directing the user to the external URL.

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://seumenha.ru/123?utm_term=vtech+kidizoom+smartwatch+dx+vs+dx2 PDF link annotation
    • https://vekeliludodim.weebly.com/uploads/1/3/4/7/134745250/9398706.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/OdgiWjb/retro_racer_coffee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_5fa2673e350e3.pdfIn PDF document text
    • http://fokefetebebinin.66ghz.com/vizozokapobokomebupigamo.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/konutureluxezanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5f9423a4b1d4a.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/jd6RIC8/train_simulator_ps4_2019.pdfIn PDF document text
    • https://satiragekawojiw.weebly.com/uploads/1/3/2/7/132740750/4e7ce7d491960.pdfIn PDF document text
    • https://tenewalewufubin.weebly.com/uploads/1/3/5/3/135329800/vovunupusalazimisuz.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/Yjhrdhc/wood_wallpaper_hd_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xonudutixova/ymhhPjj/97417579609.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/MggicCY/zombie_castaways_star_island_ice_palace_locations.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pozijirume.rf.gd/35760524490.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/vebijinaruvemumawojaz.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/oncogenic_osteomalacia_case_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/83769405135.pdfIn PDF document text
    • http://nogomazarem.epizy.com/gmat_official_guide_verbal_review_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/escape_the_dungeon_gameplay.pdfIn PDF document text
    • http://rinejifivazori.epizy.com/xuwiwepige.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA80 5576 bytes
SHA-256: 59bfb02bf28c7f4c23b746d47b0a47b7b4fa9be817032d4aede973083669b8bd
font_01_sfnt_off0000ed6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 10964 bytes
SHA-256: f954d3211be9ce7443190593306d2223df3f41cc2fbfaefc8d768774498b5c87

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