Malicious PDF — malware analysis report

Static analysis result for SHA-256 963f1813ddc5f883…

MALICIOUS

PDF

310.0 KB Created: 2021-02-08 23:17:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 070594248e369dd0485e224dcf4df7f4 SHA-1: 38facd42c2f966ada6b6024833d234484027a742 SHA-256: 963f1813ddc5f883a333f39690f5967a05967e921bfc8ed3878583df04cab32d
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of the external URI suggests the primary goal is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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://baarspo.ru/aws?utm_term=ada+easd+2019+guidelines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393754/normal_6012daa525d83.pdfIn PDF document text
    • https://xufanipup.weebly.com/uploads/1/3/1/8/131856619/abdf649251.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421039/normal_5fc62a6d5ed55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420610/normal_601932f167771.pdfIn PDF document text
    • https://kekisadubivef.weebly.com/uploads/1/3/3/9/133986731/1862193.pdfIn PDF document text
    • https://cdn.sqhk.co/wasefago/iihFjdv/sises.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/cnugxgc/boo_berry_funko_pop_35.pdfIn PDF document text
    • https://nugukijozagesek.weebly.com/uploads/1/3/0/7/130739433/nozuxukuto_divexuji.pdfIn PDF document text
    • http://buvosidif.22web.org/bhikari_marathi_movie_song.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/idgimje/merge_sandwich_happy_club_sandwich_restaurant_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/7MB0dPu/savijigadipunete.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479691/normal_5fc686ac01c9a.pdfIn PDF document text
    • https://xuvupidorok.weebly.com/uploads/1/3/1/4/131407629/14420bfe2fa9.pdfIn PDF document text
    • https://wokawopirajer.weebly.com/uploads/1/3/3/9/133999547/5c202f5d4bbff5b.pdfIn PDF document text
    • http://sq11mini.com/90119715434rwvgk.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/Lgciahg/alan_walker_greatest_hits_full_album_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wewuxujudu/fjggjhb/vintage_gold_snake_belt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416669/normal_5fddaa2c31221.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tevoburowuvule.epizy.com/easd_guidelines_type_2_diabetes_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000473bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x473BD 5368 bytes
SHA-256: 63d33a4e8d61ad60c5a4c94102170a818da679401e5a616574aeb071c90bb7f2
font_01_sfnt_off00048610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48610 14100 bytes
SHA-256: f38ac1ca440e20e9925409b4f8261cd06d6841f38e38a080207fd189bbe08c16
font_02_sfnt_off0004b37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B37C 16176 bytes
SHA-256: d5c4435c43af6fa087261d190ae0a867b31240f3ed4c825f0de413216848aa8a

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