Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c57482cab1fa1e…

MALICIOUS

PDF

93.6 KB Created: 2021-02-13 17:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 135da19eecba1740044356519d6375f0 SHA-1: 87de279d861ada3d8f2b9ab18c21aff144cfe930 SHA-256: 28c57482cab1fa1efb91e2a04200e2faf422a793c54e92b9cd1b0c20e8df7361
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to contain keywords related to popular games, suggesting a lure to attract users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=five+nights+at+freddy%2527s+4+unblocked+games+google+sites PDF link annotation
    • http://busibear.com/final_freeway_2r_apk_fullvfd65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461791/normal_60173fb2d6e27.pdfIn PDF document text
    • http://simultaneously.space/2007_jeep_liberty_repair_manualamlry.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/coWQrmu/83685850138.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/Lhjiihb/destiny_summoner_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/Micibij/14404778298.pdfIn PDF document text
    • http://mandarins.space/gym_fighting_games_bodybuilder_trainer_fight_proyvgt2.pdfIn PDF document text
    • http://italia-doc.fun/39741037374ewog1.pdfIn PDF document text
    • http://ruzeviliv.iblogger.org/bmr_full_form_in_biology.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417675/normal_5ffb610ae5227.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafaveju/gggdvmA/mevuxipeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lunowakaneruf.rf.gd/busubo.pdfIn PDF document text
    • http://voxotili.epizy.com/apa_format_references_book_chapter.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/fivosamumikudojorozilafe.pdfIn PDF document text
    • http://govusilewirot.rf.gd/14210791565.pdfIn PDF document text
    • http://xirasajizobopa.rf.gd/brave_browser_android_dark_theme.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/coreldraw_x5_for_mac_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/gakizorufevuvezepadex.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/royal_mail_envelope_size_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/american_truck_simulator_demo_kostenlos.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/pufemitowinaroxivarisobat.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEE 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off00012fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE2 5880 bytes
SHA-256: c14ed9280fa6113b7c6114fd0b889618ba53abb0f2ba7c8a613d7ec352897c6c
font_02_sfnt_off000143e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E4 10500 bytes
SHA-256: a413090221de33ef8ae2debb8fa0695d04fe49961dfd3e44d09ae485f0bc20fe

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