Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3cdf94f33cb5de…

MALICIOUS

PDF

226.8 KB Created: 2021-02-14 11:34:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fff980c87ffeba4810273f0f4157fef9 SHA-1: 50f96445313d42f64aae75d53639d63077661a46 SHA-256: 1a3cdf94f33cb5de555b0212f78b7a0b476a1dd7f8265bd32989a24a58122526
104 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI and the 'Urgency / deadline lure' heuristic suggest a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF format and the nature of the heuristics point towards a malicious document designed to trick users into clicking embedded links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9533

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/aws?utm_term=yuki+onna+nioh+guide PDF link annotation
    • http://sberin.xyz/nice_guidelines_for_copd_exacerbationw6rpt.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/fhdhjaX/carrom_board_game_play_with_computer.pdfIn PDF document text
    • http://dutusejutax.22web.org/forte_sheet_music_software.pdfIn PDF document text
    • http://copyright-help-center.com/sidufewuzimejulupesafeiy1yr.pdfIn PDF document text
    • https://xokefazekuli.weebly.com/uploads/1/3/5/9/135992394/loloruzezuw-dudume.pdfIn PDF document text
    • http://rekipeva.iblogger.org/kezovefozuraxewejezo.pdfIn PDF document text
    • https://cdn.sqhk.co/kerosumumato/geiejef/kick_the_buddy_mod_apk_no_ads.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/rZNijie/tovinawijevasi.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/Ou9jigi/frozen_potstickers_near_me.pdfIn PDF document text
    • http://rabota-plus.club/doctors_sick_note_templatey18i2.pdfIn PDF document text
    • http://jodesomuxuduzu.22web.org/sapivufoveviravufiwanosow.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/nunud.pdfIn PDF document text
    • http://koolmaxt.online/whistler_snow_report_opensnowshjmr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiwemevi.rf.gd/dalli_rajhara_weather_report.pdfIn PDF document text
    • http://moganip.epizy.com/pejopifatewovas.pdfIn PDF document text
    • http://fofifalog.rf.gd/49466208078.pdfIn PDF document text
    • http://zosuvupetod.epizy.com/chitrangada_movie_telugu.pdfIn PDF document text
    • http://bawawajabatura.epizy.com/lopix.pdfIn PDF document text
    • http://mimodiko.epizy.com/aws_consolidated_billing_report.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003032d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3032D 10356 bytes
SHA-256: e0277eb0f1b9d722c7aa1088a373f210252133f115393bd399850451fe8b2cf7
font_01_sfnt_off00032522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32522 4804 bytes
SHA-256: 06a2eb19650d39108007b910ed54f91a6cc0d1e33858ceb963dc3d5bc5824497
font_02_sfnt_off00033576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33576 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_03_sfnt_off000340d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x340D9 11396 bytes
SHA-256: 396e346473eb94fabfc659edfecac020924e8802ec7b905239818e8c7b3eb51c
font_04_sfnt_off000366fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x366FB 16192 bytes
SHA-256: eb29371a9263d1efed02b1533fb53138ee823a98fbd078e52407dfdd24d7a728

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