Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be615d42f7e9965…

MALICIOUS

PDF

71.5 KB Created: 2021-03-03 17:38:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: ea7c981bb8041293b534aaa1477fb69e SHA-1: f9a801364fa8a7a35828f50cfafb685d8ba1c7e5 SHA-256: 1be615d42f7e9965fde38778d363c1f018abcadea5ec2ea577db2d54a04ece57
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, suggests a lure related to 'contractions grammar worksheets grade 5'. The embedded URLs likely lead to further malicious content or phishing pages. No scripts were extracted from this sample, but the PDF structure and embedded URIs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/wix?keyword=contractions+grammar+worksheets+grade+5 PDF link annotation
    • https://cdn.sqhk.co/mowanideju/603gdjg/emotional_freedom_technique_training_online.pdfIn PDF document text
    • http://osmosiotzs.fun/15901150904r9gnr.pdfIn PDF document text
    • http://sale20.site/nier_automata_emils_headq4v3x.pdfIn PDF document text
    • http://table-wait.com/mejibebebodh470.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/icDjche/1970_brisbane_rugby_league_grand_final.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/7jdhage/43777057260.pdfIn PDF document text
    • http://goodsfor.life/2005_cadillac_cts_vecftw.pdfIn PDF document text
    • http://itdiscount.pro/buker_ba_pashe_audio_song_freeksdpq.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/haCK6ew/94997315404.pdfIn PDF document text
    • http://kostlike.site/landmarks_in_humanities_4th_editionvsi9i.pdfIn PDF document text
    • https://cdn.sqhk.co/kifateten/hbjijcP/the_longest_game_ever_2_achievements.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/cSgibrg/zeriw.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/fS633bx/bilazikofub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAD 5508 bytes
SHA-256: ee273422c8fb4ebc7bc0c5aea8b04b1b9c06d4d01b8946cd246f5b33f94f31c8
font_01_sfnt_off0000ee49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 10240 bytes
SHA-256: 68cd71258c0da69524406af33574b76b4f4db7516b6bd295d7b126800373a6f3