Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da7c01cf3e549f5…

MALICIOUS

PDF

75.2 KB Created: 2021-04-07 00:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ff48d3c13a9a823911880beef4fdcbe9 SHA-1: e87a5e7455869c206ef3afd63074967171192efc SHA-256: 4da7c01cf3e549f5b8b2d671e300323b68fdf6a35b182f512913ba5236df3165
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a URL that mimics a search result for 'human muscle anatomy pdf', suggesting a phishing or social engineering lure. While no scripts were explicitly extracted, the PDF structure and embedded URI strongly indicate an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/award?keyword=human+muscle+anatomy+pdf PDF link annotation
    • http://miribut.mywebcommunity.org/how_to_get_time_capsule_in_upper_west_side.pdfIn PDF document text
    • https://pufotesur.weebly.com/uploads/1/3/1/3/131378771/2005938.pdfIn PDF document text
    • https://sinuvuliwazima.weebly.com/uploads/1/3/1/8/131871572/6190110.pdfIn PDF document text
    • http://fimewot.xyz/who_are_the_characters_in_the_landladyvr4u1.pdfIn PDF document text
    • http://rigares.iblogger.org/bread_making_process.pdfIn PDF document text
    • http://1xbets-regs.site/988308473291ifol.pdfIn PDF document text
    • https://dojepojejexun.weebly.com/uploads/1/3/4/6/134668276/zikunovunok.pdfIn PDF document text
    • http://vijepuwobewi.mygamesonline.org/78131513852.pdfIn PDF document text
    • http://uber-global.com/hoover_spinscrub_50_cleaning_solutionxzd1j.pdfIn PDF document text
    • http://zitukuwekoba.sportsontheweb.net/bimujedus.pdfIn PDF document text
    • http://bakavorun.getenjoyment.net/21325111633.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fizup/easy_guitar_chords_chart_songs.pdfIn PDF document text
    • http://nuzoniwetavo.rf.gd/54123899328.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/what_is_the_greysheet_food_plan.pdfIn PDF document text
    • http://damexodawu.epizy.com/39115272210.pdfIn PDF document text
    • http://ranevumovadul.rf.gd/72782734289.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/cuanto_cuesta_el_metro_cubico_de_arena_gruesa_en_peru.pdfIn PDF document text
    • http://balubusepebibi.rf.gd/8595693565.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/graco_solano_4_in_1_convertible_crib_with_drawer_white_washed_natural.pdfIn PDF document text
    • http://femagela.myartsonline.com/23897086986.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/renew_oklahoma_drivers_license_online_military.pdfIn PDF document text
    • http://zawanaxakav.epizy.com/87872127061.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_off0000e9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D3 5268 bytes
SHA-256: 5a004520782c05b307e9be581e89094fded7c7a05e8ea9bcbfba3d5be212bf9d
font_01_sfnt_off0000fbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 10444 bytes
SHA-256: 78858231b99d8ee6d98099e4a98dbc5aa2aebacf136afd38e06fecf0ed514d8a

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