Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b51c1be3b7b6709…

MALICIOUS

PDF

220.1 KB Created: 2021-04-04 17:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adcfc24a78178988d4ccdf74a878790a SHA-1: e3b533fe858c5c8c3b799aa6c000ed449da111c8 SHA-256: 1b51c1be3b7b67099bee3734e061f674be8c54ff54de04cafd0eb5388772f4e9
136 Risk Score

Malware Insights

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

The sample is a PDF document that exhibits characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. It contains external URIs pointing to domains that are likely part of the scam infrastructure. Although no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the exploitation of PDF vulnerabilities or the delivery of a malicious payload via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9817

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/award?keyword=venezuela+crisis+explained+pdf
    • https://cdn.sqhk.co/gigepiwej/2qjc3gh/new_army_pt_test_run_standards.pdf
    • https://cdn.sqhk.co/rozamulev/icvymqm/diverse_experience_in_a_sentence.pdf
    • https://cdn.sqhk.co/bulunazi/Hggiuic/live_cricket_match_under_19_world_cup_streaming.pdf
    • https://cdn.sqhk.co/gejupajo/bhiijbe/lemaretuxanemodun.pdf
    • https://cdn.sqhk.co/navimoxa/fhhQrDu/busuwegiwasogu.pdf
    • https://cdn.sqhk.co/wuvupalib/igRiiig/aaa_hockey_teams_in_california.pdf
    • https://cdn-cms.f-static.net/uploads/4461211/normal_604681e9568f7.pdf
    • https://cdn.sqhk.co/ruwonumatag/hjpK9Xh/sidex.pdf
    • http://wersita.fun/making_wood_tools3uo0w.pdf
    • https://cdn.sqhk.co/wefopijupe/8uEMigi/capture_the_flag_game_online.pdf
    • https://cdn.sqhk.co/sibamoxa/qtqiahf/metlife_clock_tower_building_nyc.pdf
    • http://investmag.org/26883161537tak6u.pdf
    • http://woxijakuzadajew.getenjoyment.net/pdf_to_base64_android_studio.pdf
    • http://gagogepatajebe.medianewsonline.com/54825903972.pdf
    • http://bitjoms.xyz/juxujubawabutapkb439.pdf
    • https://cdn.sqhk.co/tamoravuwera/fWjejcD/premier_league_fantasy_gameweek_36.pdf
    • https://cdn.sqhk.co/tedigedubemi/PGQgdZj/soccer_world_cup_championship_list.pdf
    • http://fitness-ital.fun/republic_act_9003_solid_waste_management9yaqh.pdf
    • https://cdn.sqhk.co/dipujabuxiw/Q8jfhad/51621126407.pdf
    • https://cdn.sqhk.co/zoribakim/gdtCgjx/innawoods_download_ios.pdf
    • http://rm-swis-mine.com/30061992349ctrab.pdf
    • https://cdn-cms.f-static.net/uploads/4416132/normal_6057fa0d7ebfa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://memamawu.onlinewebshop.net/bsc_agriculture_entrance_exam_books_free_download.pdf
    • http://manosotidokef.myartsonline.com/15059841248.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000307e8.bin
7bd0ffd792c7b315f58e724888b1c250935926c9a77c1d4c7ae3d56abf1074df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x307E8 7796 bytes
font_01_sfnt_off00032228.bin
d0551120052d1a21e7599ca5e14bc409f7298a7bfd09c3a158751545744267af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32228 5232 bytes
font_02_sfnt_off0003341a.bin
7be6c2fa610785540caf502861b5f61d3d84ed107096f202b6b4b00fa3495293		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3341A 13872 bytes

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