Malicious PDF — malware analysis report

Static analysis result for SHA-256 b894b9e43dc46372…

MALICIOUS

PDF

71.2 KB Created: 2021-01-22 12:24:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: de202b05ffcdd39a9fa7c47e647992de SHA-1: 23ba4d3d20ec7f915974c9cf087a34c7c9715b8b SHA-256: b894b9e43dc463720fdf1f5cedb2ae909eedfe866ba12880b5d1964ccad93510
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The presence of an external URI and the overall detection suggest a phishing attempt or a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=cape+dory+30+mkii PDF link annotation
    • https://site-1174259.mozfiles.com/files/1174259/81836465287.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404723/normal_60096dc641b51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497646/normal_5fd06773033c0.pdfIn PDF document text
    • https://cdn.sqhk.co/vofudejobif/hhjcght/classcraft_student_login.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/hhdjdGX/wetubamuximamuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367961/normal_5ff133509ac1e.pdfIn PDF document text
    • http://ratonawe.iblogger.org/22517375053.pdfIn PDF document text
    • https://site-1176205.mozfiles.com/files/1176205/vatugelejasuri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453105/normal_5fc966e73b81e.pdfIn PDF document text
    • https://site-1171987.mozfiles.com/files/1171987/nursery_rhymes_bedtime_songs_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485569/normal_5ff47d1c9d14e.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/ieYuK2z/wordhane_word_scramble_word_finder.pdfIn PDF document text
    • https://site-1172540.mozfiles.com/files/1172540/police_motorbike_chase_crime_shooting_games_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zasaraba.epizy.com/fanolezikufiziku.pdfIn PDF document text
    • http://mujelolix.epizy.com/weribaripudalisikufe.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/zapikagekenetagukuxoma.pdfIn PDF document text
    • http://dowijasimenazo.epizy.com/jakugutoledowomasunaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/duxelujaz.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_off0000d822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD822 5272 bytes
SHA-256: 75e6a38a88d94a0ae5e81d0ac63515c2ba4cb75b27fb67fc0713f30a3044d0ba
font_01_sfnt_off0000ea09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA09 11212 bytes
SHA-256: 7112172a9c02145a2f287d60c2c464eea79b0912c14480239fadb8ffb56c82ad

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