Malicious PDF — malware analysis report

Static analysis result for SHA-256 74eb7150285b3a40…

MALICIOUS

PDF

70.2 KB Created: 2021-02-12 16:21:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4517cef4ecf703eb77ed3efff7afada3 SHA-1: 7454211fad4efc275a7d953c6218aa4e00100abe SHA-256: 74eb7150285b3a4024d295f30ffa7cc07fe5ab3ee9a8cf592f5eb4fc9564ae97
104 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://jacksth.ru/wix?keyword=4.4+biomes+answers', which is likely the download source for a secondary payload. The presence of a visual download button heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=4.4+biomes+answers PDF link annotation
    • https://cdn.sqhk.co/wazafanez/IhdJgfZ/history_of_africa_bbc_episode_16.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/PDhhhaz/nujorekigogupodapu.pdfIn PDF document text
    • http://basvuruizleme.online/75325157795fie5l.pdfIn PDF document text
    • http://1xbets-reg.site/gikibifibqg2y.pdfIn PDF document text
    • http://shop-kid-toys.online/srimad_bhagavata_puranaz8to4.pdfIn PDF document text
    • http://kemotunitajifap.iblogger.org/32452223086.pdfIn PDF document text
    • http://luferuvijudadof.22web.org/noaa_gis_data.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/igdjcNa/watch_history_of_africa_bbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogojazaje.rf.gd/4768610170.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/report_fake_apple_id_email.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/63596486978.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/birthday_song_tamil_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/free_benefit_fundraiser_flyer_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/wipimawubadijorawigi.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/chrome_ubuntu_64_bit_terminal.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/labour_force_survey_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/lampoon_crossword_puzzle_answer.pdfIn PDF document text
    • http://fofogagad.epizy.com/welcome_back_to_school_poster_template.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/22017306059.pdfIn PDF document text
    • http://wasalesex.epizy.com/21524354642.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_off0000d6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B4 5056 bytes
SHA-256: ec112272bc02096aaa9226daf5d080126f9605db720af3725b2f9422593ad55b
font_01_sfnt_off0000e7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E4 10520 bytes
SHA-256: 1297a0597976d10bbb40eacc9245e2879b6561be90ded061eee03cb06d251060

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