Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1426965cd7ec56a…

MALICIOUS

PDF

74.9 KB Created: 2021-04-21 20:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5db654653bcd7cb6652163be14e44b6e SHA-1: 788e4e1deb302ff75e760ec365a91a219bbc9e84 SHA-256: f1426965cd7ec56aaf307c8bd48cde5e279c8a33036637f71f53f252a51a0c52
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, 'baarspo.ru'. This domain is likely used to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'maths magic tricks', suggesting a lure to disguise the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://baarspo.ru/strik?utm_term=amazing+maths+magic+tricks+in+hindi
    • http://reduslim-europa.site/how_to_find_z_for_95_confidence_intervaldma31.pdf
    • http://bezerojiw.scienceontheweb.net/calligraphy_english_fonts.pdf
    • https://cdn-cms.f-static.net/uploads/4370088/normal_602df628d65e2.pdf
    • https://cdn-cms.f-static.net/uploads/4377642/normal_60567a81b3a7d.pdf
    • http://leomannapov.com/199842669917nwqp.pdf
    • http://ledimpress.biz/nissan_370z_facelift_2018_interior5wskn.pdf
    • https://cdn-cms.f-static.net/uploads/4459170/normal_6020bfdb0533c.pdf
    • https://cdn-cms.f-static.net/uploads/4471719/normal_6044614354e01.pdf
    • http://megahit.space/7248373197599gee.pdf
    • https://cdn-cms.f-static.net/uploads/4404287/normal_6032cde8c40e4.pdf
    • http://bcpzon4segurabetaviabcp.com/the_blind_side_book_quotesu2s4w.pdf
    • http://idealicaitalia-oficial.site/vamugowowigimo20jvq.pdf
    • http://ogranicbio.space/sudezuwi3ydrw.pdf
    • http://zootime.store/what_does_moon_and_stars_meanlppxt.pdf
    • https://cdn-cms.f-static.net/uploads/4376369/normal_603813e2205f9.pdf
    • http://invitesistem.ru/boss_baby_girl_birthday_party_decorationsdibgq.pdf
    • https://cdn-cms.f-static.net/uploads/4367624/normal_6060f6816a6d0.pdf
    • http://mikazuxo.mypressonline.com/86702449084.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tubukeganuji/beyonc_formation_album.pdf
    • https://s3.amazonaws.com/kikunojulejuj/what_a_beautiful_sunset_quotes.pdf
    • https://s3.amazonaws.com/fifomi/word_cookies_answers_fig_level_10.pdf
    • http://pojoviraxerojo.myartsonline.com/52733611229.pdf
    • https://s3.amazonaws.com/tupofelasujewas/25296603679.pdf
    • https://s3.amazonaws.com/wajufifenoxuj/que_son_los_dispositivos_de_procesamiento_de_una_computadora.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_off0000e655.bin
b2e92d8f59ccd3b959c2f525ed7103e36bd4176e634d5a573e7631b0ac53cb73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE655 5424 bytes
font_01_sfnt_off0000f89e.bin
581a76f858780dd4e4b41a208b4c11ede84183b39390dde3d1039537f1541241		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF89E 10928 bytes

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