Malicious PDF — malware analysis report

Static analysis result for SHA-256 9428b314ecb1df06…

MALICIOUS

PDF

74.3 KB Created: 2021-03-30 10:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2aa2895a796c696e2d99ec4cdfc2482 SHA-1: 9755130b35d6cc139116ac5f092415eabf99d64e SHA-256: 9428b314ecb1df062590d20c60790f9234fa0679ecf51b49bc3364c78deef52e
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to memorizing the periodic table, directing the user to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit users by redirecting them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=how+to+memorize+periodic+table
    • http://anarchymedya.com/gupiguw5pajp.pdf
    • http://gejudoxe.mypressonline.com/afghanistan_history_in_pashto.pdf
    • http://vinnipoh.space/what_is_a_homemade_diet_for_dogsrjs2h.pdf
    • http://superheatbelt.xyz/software_testing_course_fees_in_navi_mumbaisk8pr.pdf
    • http://losmopaka.site/german_word_family_dictionarysiww9.pdf
    • https://cdn.sqhk.co/zowipitilo/0kP8zje/hd_dope_cool_wallpapers_4k_apk.pdf
    • https://cdn.sqhk.co/rolidofajug/hgjhxDi/payment_slip_format.pdf
    • http://mizafaroremida.getenjoyment.net/liduvaresawes.pdf
    • https://cdn.sqhk.co/pekobenew/PhdzR2W/vanavodona.pdf
    • http://pay-order.info/how_to_set_date_on_keurig_water_filter6era7.pdf
    • http://onlyforyou.space/62049392260jznx7.pdf
    • https://cdn.sqhk.co/zawumelapo/pIMgcjh/pifosokosujapijoranawude.pdf
    • http://service-hire.com/university_of_southern_california_business_analytics_gre_scorewgmsn.pdf
    • https://cdn.sqhk.co/xemugugafot/Jjdhjb0/63265340749.pdf
    • https://cdn.sqhk.co/berovanova/fIYiajd/rofab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kavibajegis.onlinewebshop.net/cuisinart_cpc_600_series_manual_espaol.pdf
    • https://s3.amazonaws.com/zedudo/sound_dampening_foam_sheets.pdf
    • https://s3.amazonaws.com/metubevozisul/kelurubidof.pdf
    • https://s3.amazonaws.com/kulinisokakewi/jaful.pdf
    • http://bebovufuvuji.myartsonline.com/mind_reader_book_bangla.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_off0000e4d3.bin
20ebac08562c4a3cdc41c8ca461ad605e7671fcdd02e00013f956eca5716c1c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D3 5284 bytes
font_01_sfnt_off0000f6c2.bin
06c31d554a0b47a04b3582f70ff05ec49d9eae38607d64340f8ca6ec8827c08d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C2 10536 bytes