Malicious PDF — malware analysis report

Static analysis result for SHA-256 212ec46ba518c4d4…

MALICIOUS

PDF

74.1 KB Created: 2021-02-21 06:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d442c9da14fc73d29442b550941c37b9 SHA-1: b50b5ab22e573355436af8a20826fc2b3667e384 SHA-256: 212ec46ba518c4d4f9d9c8bccf8cc4437e269b2ea30e8f972b18f642e38b7ad2
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text that might be intended to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=somewhere+over+the+rainbow+original+lyrics+ukulele PDF link annotation
    • https://cdn.sqhk.co/fagaxirupunu/luhfgdf/teach_english_online_from_home_south_africa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466386/normal_5fede5d625eb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500425/normal_602a154b483ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414166/normal_5fd9c36c6ad47.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/GoEZ0hg/best_brawl_stars_characters_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477623/normal_6000ac5788a9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426267/normal_6004feff65fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_60265277d2f2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412890/normal_5ff2bde0927b9.pdfIn PDF document text
    • https://cdn.sqhk.co/munemuzabuk/iawVgjA/48249795842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474475/normal_5fd6526731802.pdfIn PDF document text
    • https://cdn.sqhk.co/sozovifena/ifghjEr/juventus_vs_ac_milan.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/hhddqb3/go_long_meaning_in_football.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/Yjbjbjg/new_five_nights_at_freddy_s_game_2020.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/saziwijaxodav/bhakti_film_full_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/nuns_chorus_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/27596346970.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/company_resignation_letter_format_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/84729851519.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/terminator_genisys_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/dasumefuruboza.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24C 5772 bytes
SHA-256: 5cc7bfa868f353c24002143625237b5a48e70e7f6e1582e2f7494aebfeffbd5d
font_01_sfnt_off0000f5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E8 10648 bytes
SHA-256: f42fdcd56c7c4ac5a9203d0dc7187d3f9351a6bc6d1d2bb118a201f18e2501e7

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