Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e8a5dc7bef0cd1…

MALICIOUS

PDF

78.3 KB Created: 2021-03-22 15:10:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee321a6b003f8ff09ac852409904a379 SHA-1: 9de5504984cc0e14ab6fa3e1a546d5948783a1f9 SHA-256: 21e8a5dc7bef0cd1e574f0f51fdb742cf159021afbf910ff051f6b6eeaada4f1
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'pelibifir.ru' suggests the document is designed to redirect users to a potentially harmful website. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely leveraging social engineering to trick the user into clicking the link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/aws?utm_term=brother+p+touch+900w
    • http://rating-bookmaker.ru/pubawasec9idp.pdf
    • http://biotringel.shop/fofomevese1yxt.pdf
    • https://cdn.sqhk.co/pubamegumox/lNVifXt/cover_orange_journey_knights_level_20.pdf
    • http://bupro.asia/takirawu5nlws.pdf
    • https://cdn.sqhk.co/xegogeji/n3idigN/gakunufi.pdf
    • https://cdn.sqhk.co/pugirunosamo/cK442ig/cargo_delivery_truck_parking_simulator_games_2020_download.pdf
    • http://meine-gebuhrenfrei.com/free_spaceenginge_downloadltk8r.pdf
    • http://steblin.pro/stick_war_2_unblocked_full_screenc5jj4.pdf
    • https://cdn.sqhk.co/bokirebi/Vjbgd7F/zesani.pdf
    • http://avtoshkola-region26.ru/vuvasirt96c.pdf
    • https://cdn.sqhk.co/jezaziritav/Vibieij/cfo_meaning_medical.pdf
    • https://cdn.sqhk.co/dugukiser/VOze0ia/wazizemiki.pdf
    • https://cdn.sqhk.co/konajera/2BJhcwH/15327375421.pdf
    • https://cdn.sqhk.co/kulamogo/hagcshe/37160210259.pdf
    • https://cdn.sqhk.co/dopuwene/M3jjjaR/binge_drinking_translate_to_spanish.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bulujono/what_is_does_caliphate_mean.pdf
    • https://s3.amazonaws.com/rakabexozu/fiat_tipo_lounge_senza_android_auto.pdf
    • https://s3.amazonaws.com/nagudo/hatsune_miku_vocaloid_4.pdf
    • https://s3.amazonaws.com/satulibaren/anger_management_worksheets_high_school.pdf
    • https://s3.amazonaws.com/lefemijip/alien_vs_predator_game_pc.pdf
    • https://s3.amazonaws.com/wopari/bhagavad_gita_summary_in_telugu.pdf
    • https://s3.amazonaws.com/mudurixo/feboramodezon.pdf
    • https://s3.amazonaws.com/visagogijulep/bounty_hunter_metal_detector_2200_manual.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_off0000e2c5.bin
80e557ad61021532155319b3eb7cf92336293b670d2008f8fd6d5b5a3e8668f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C5 5040 bytes
font_01_sfnt_off0000f403.bin
4b203246d7708722b1936a7900775331914b7536218abcbfab986922b22df70b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF403 25184 bytes