Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0c6c4c8a57f094…

MALICIOUS

PDF

83.3 KB Created: 2021-02-22 18:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 0710c6b3d8eedb72879e16fb06685069 SHA-1: 7388221bcedcfd9c3eec981668b74a0c8878f2b1 SHA-256: 9b0c6c4c8a57f09443438fbdadf1e0690c778a35bcbf671b3b2b56a443c62b9a
136 Risk Score

Malware Insights

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

The PDF document contains a heuristic indicating an external URI pointing to 'baarspo.ru', which is associated with a Facebook Messenger login lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or trojan delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a phishing attack, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://baarspo.ru/strik?utm_term=facebook+messenger+login+failed PDF link annotation
    • http://specrazreshenie.com/logic_puzzles_printablelogic_puzzles_printable5ieww.pdfIn PDF document text
    • https://cdn.sqhk.co/loboremetoxe/hjfhfUF/auto_move_to_sd_card_pro_apk.pdfIn PDF document text
    • http://perfectiona.online/niluxalaperodizufoniwurkg1eu.pdfIn PDF document text
    • http://4338bacchus.com/coleman_powermate_6875_owners_manualffewz.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/thDhjie/football_manager_brazilian_team_names_list.pdfIn PDF document text
    • http://letogala.iblogger.org/marathi_to_english_translation_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nimotixalulo/ifufzpv/soccer_champions_league_game.pdfIn PDF document text
    • http://samyog.ru/diablo_3_season_22_builds_rhykkerw43li.pdfIn PDF document text
    • http://bestita.space/261591432618qe1w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/buganabowumujef/ccna_bangla_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/moses_prince_of_egypt_movie_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/free_background_music_for_wedding_video.pdfIn PDF document text
    • http://dizibabazuvuxu.rf.gd/abby_demons_osrs_guide.pdfIn PDF document text
    • http://jirataser.rf.gd/81616691444.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/academic_performance_questionnaire_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/aspire_salary_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/gazonudiferoduxoxitonawe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24E 7468 bytes
SHA-256: c46d93310612134196a0ec842a3599055cfe4735696e7069d536717c941ba4f1
font_01_sfnt_off0000fba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA7 5208 bytes
SHA-256: ec9315c8d32919bce1f7be1ca94db07bfcce785d6f7e1f5eb15b15d702fd0a28
font_02_sfnt_off00010d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D33 10716 bytes
SHA-256: f17465268c7a1de6ac0c0f88ff5fc3911f03332f2fb2249a59bacb9e1e2f34c8
font_03_sfnt_off00013163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13163 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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