Malicious PDF — malware analysis report

Static analysis result for SHA-256 204fcc68cc33eaed…

MALICIOUS

PDF

69.9 KB Created: 2021-02-10 04:35:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8bd4e3badbc62852dbbd563c759f21a6 SHA-1: 13d8723aab4c6764682633502cb3f4c0a14c935b SHA-256: 204fcc68cc33eaedb90bd7980d7641181c1cb095e6f28f53532725d0f4be364f
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 a common tactic for phishing or distributing further malware. The document body, though heavily obfuscated, contains references to wkhtmltopdf and a date, suggesting it might be a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/aws?utm_term=sholawat+innal+habibal+musthofa+alfina+nindiyani PDF link annotation
    • http://maximizator.space/865331769708a6ps.pdfIn PDF document text
    • http://steblin.pro/49135229903vjzdq.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/fqnidid/pregnancy_due_date_tracker_with_contraction_timer.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/DhbHK0a/color_fill_3d_program.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/gijtieJ/tops_to_wear_under_jumpsuits.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/jiijgjI/video_calling_apps_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496193/normal_5fe22b9196215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_600d6aedd0a69.pdfIn PDF document text
    • https://cdn.sqhk.co/purizepore/eieLnif/colour_bump_game_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/narulaloro/TkwU7oo/84602005136.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/dghidY7/nobububuxiwadaxad.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/fnom6Qw/warzone_update_season_6.pdfIn PDF document text
    • https://cdn.sqhk.co/mezugifosa/whd7pf3/how_to_get_gems_on_episode_2019.pdfIn PDF document text
    • http://komarovskii.xyz/escalas_de_guitarrarb8fn.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/jyk3jbL/95542163734.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/guwutivupudutu/wagiz.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/xifalotinexenifizosoxod.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/81726768723.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/labiko.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/august_2019_printable_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/fividegasisuvupuf.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/21777615917.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/android_auto_developer_mode_features.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_off0000d1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FD 5488 bytes
SHA-256: 308dc98655b4117053468aa8ae39be42ec89a0614bf3951b897ab0ea9a67082d
font_01_sfnt_off0000e49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49A 10372 bytes
SHA-256: fdf632a329420d2cd36978e86980fc5d1e42365a7d702cf26b123ed3e6234548

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