Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87b9608b28629fe…

MALICIOUS

PDF

97.1 KB Created: 2021-01-24 07:16:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d77dd0f1d7b1074119dcc4281a619564 SHA-1: 14a736c65729e28244249e92d1669160148f6032 SHA-256: a87b9608b28629fe5812f68b99c05db9a1e68932f991427243eac321aee71426
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, 'trafficel.ru', which is likely used for phishing or to serve a malicious payload. The document body is heavily obfuscated, but the presence of an external URI and the overall detection suggest a malicious intent to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=bloom+into+you+episode+1 PDF link annotation
    • http://xevidome.iblogger.org/uncle_bob_clean_code.pdfIn PDF document text
    • https://site-1179590.mozfiles.com/files/1179590/keto_food_guide.pdfIn PDF document text
    • https://site-1173288.mozfiles.com/files/1173288/third_person_shooter_games_android.pdfIn PDF document text
    • https://site-1178726.mozfiles.com/files/1178726/mit_application_for_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/bubarozotuj/ZgezgjG/rugby_league_table_1990.pdfIn PDF document text
    • https://cdn.sqhk.co/junigofulum/cSPTzgi/punefi.pdfIn PDF document text
    • https://cdn.sqhk.co/razupojoja/I9gjkhi/d_d_forgotten_realms_sword_coast_map.pdfIn PDF document text
    • https://site-1176551.mozfiles.com/files/1176551/80999616673.pdfIn PDF document text
    • https://site-1177546.mozfiles.com/files/1177546/tokiroxumorixajedunomovig.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/fmnjiu1/tux_racer_speedrun.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/belapawerezuju/acronis_backup_recovery_12._5.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/tnpsc_group_4_answer_key_2019_september.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/abulia_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/citrix_receiver_for_chrome_free.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/manual_da_lavadora_brastemp_ative_11kg.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/world_map_countries_and_cities.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/amapiano_mix_2018_datafilehost.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/cancellation_letter_template_for_gym_membership.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E4 30488 bytes
SHA-256: d1820db9c59d9aff50be99a32b23047c1fb2b012ffe6d8bce8f2ef5b6b526068
font_01_sfnt_off00014012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14012 5000 bytes
SHA-256: 5e3ad0af521789643a9a01efc22cf1117253a2e75028a803a44a37a530d47d39
font_02_sfnt_off00015117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15117 11444 bytes
SHA-256: 74649f9a3d86ca07502a39a49044745acb42398087e12eaa157ce4c3e1912fbc

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