Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a60bcd9379db31f…

MALICIOUS

PDF

80.7 KB Created: 2021-03-23 07:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d25da6187fe69a76e282915b83a1e0f SHA-1: 81bc9b74eeb51331a3cda5da2894e0370626dbae SHA-256: 4a60bcd9379db31f333346622769ace371f3450721986f4468b06847bba5bb06
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to potentially malicious sites, as indicated by the ML classifier and ClamAV detection. The document body, though heavily obfuscated, suggests a lure related to 'school administrator interview questions and answers pdf'. The presence of external URIs and the overall detection by multiple security tools strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/award?keyword=school+administrator+interview+questions+and+answers+pdf
    • http://uspex22.online/mixujetuwusimuwinjdrck.pdf
    • http://cyberghost.store/cartes_du_ciel_androidde8ti.pdf
    • http://prizinsta24.site/el_santo_rosario_meditado_dia_lunesjt6p9.pdf
    • https://wedabivugexum.weebly.com/uploads/1/3/0/9/130968949/zivobi.pdf
    • http://talebakela.iblogger.org/biludazasiwepi.pdf
    • http://trendmobile.ru/line_6_helix_lt_manual_deutsch4c650.pdf
    • http://websporizle3.com/56200199937u0f40.pdf
    • https://teriwogawuf.weebly.com/uploads/1/3/2/8/132815342/688d9.pdf
    • http://uablog.website/134353179729csr4.pdf
    • https://tefuvaxijo.weebly.com/uploads/1/3/0/7/130739162/d99970adecfaf.pdf
    • http://medway24.com/askip_apk_ioshz2jm.pdf
    • http://testvvd.xyz/kezuxojisikedezokonoad4.pdf
    • http://kushtanash.ru/44968917751roljn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tubusivi.rf.gd/4_pics_1_word_8_letters_to_do_list.pdf
    • https://s3.amazonaws.com/zosevid/what_does_outside_of_time_and_space_mean.pdf
    • https://s3.amazonaws.com/retobifulipo/zofutubanamevez.pdf
    • https://s3.amazonaws.com/woxojuxafopuv/liberty_bell_march.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe7f.bin
5b7d0e6206376510bfa86eef5b6b9a756a5eb894fe35c113d2bf05161faa5cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 5776 bytes
font_01_sfnt_off00011214.bin
e9d9057724f72dfa5add960009aa427bb01027ec1057c51825656aa5724e8467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11214 10636 bytes

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