Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a75b87c60d3ddff…

MALICIOUS

PDF

72.3 KB Created: 2021-02-22 23:51:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 21b595b2b43934672d85fcb7eb632ef1 SHA-1: 55f211b7a571feb1182061e0a5924c1d7d8ddf43 SHA-256: 4a75b87c60d3ddffa91f32898a9947454db0dbf6832d6f008944fdd2e7963b79
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, which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'doing data science pdf'. No scripts were extracted, but the presence of external URIs and the nature of the detection 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://leonvi.ru/wix?keyword=doing+data+science+pdf PDF link annotation
    • http://demask.space/xumojewabifibijuy4xv1.pdfIn PDF document text
    • http://like-store.site/muvunawufolamuniqvgs0.pdfIn PDF document text
    • http://allerop.xyz/38795856820oxo5a.pdfIn PDF document text
    • http://dhl-order.info/pinatamasters_download_mod_apkvqrga.pdfIn PDF document text
    • http://amaryllis.space/can_i_use_epic_on_ipadvdlu5.pdfIn PDF document text
    • http://jalogeteka.iblogger.org/netflix_app_for_windows_10_laptop.pdfIn PDF document text
    • http://d-youtube.com/city_car_drift_racer_game_downloadguok6.pdfIn PDF document text
    • http://sodalabs.club/57686088562sed1g.pdfIn PDF document text
    • http://frontend-developer-azaynullin.site/kufanedidojigwiitn.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/vukumesoj/tamil_dubbed_cartoon_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/76263066115.pdfIn PDF document text
    • http://fowudunomus.epizy.com/kawuxozumapal.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/bivivajuzunilegedadusamo.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/rodomomurizapesabivefix.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/60082005226.pdfIn PDF document text
    • http://bakenexiradofo.epizy.com/aggiornamento_android_8_lg_g5.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/authority_letter_format_for_visa_collection.pdfIn PDF document text
    • http://jepisaf.epizy.com/best_wallpapers_hd_for_mobile_free.pdfIn PDF document text
    • http://zoletafexogixa.epizy.com/vepuzogifunuz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD154 4980 bytes
SHA-256: 19b67b1d39af99ed149a06f908f68540923c8485a5978f8e7cc1ea7158899c9b
font_01_sfnt_off0000e25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25F 10456 bytes
SHA-256: 62ce4932f639372dfa3af02df998b40bc014d5c8a58dad6b6bea6e99bcd54b08
font_02_sfnt_off00010611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10611 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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