Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e07c54333a4bd9…

MALICIOUS

PDF

76.5 KB Created: 2021-01-06 13:02:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1e2e9bab1fd45c93e2e44ec7ad511bf7 SHA-1: db7e15a5e237537101a1a357c51f09c0834d1bf3 SHA-256: f5e07c54333a4bd978fdf7ca528f6e09ed4bdaa3523491dcbbfe7fc3502dbb6b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a worksheet answer key, likely to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. No scripts were extracted, but the presence of an external URI is a primary indicator of a phishing attempt.

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://traffset.ru/123?utm_term=triangle+proportionality+worksheet+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377414/normal_5f966e54a01d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f98e04b1d6f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5fa9ff97db0b4.pdfIn PDF document text
    • https://cdn.sqhk.co/muvasesuru/d8hjdZE/bounce_classic_game_download_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405674/normal_5fc4d2db102cc.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/kiwopusafize/matezojirur.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/62531588826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cfec8f0-a94f-4e73-a3ab-e9f46420d9cd/56950683603.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/herbalism_profession_guide_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/23214878379.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/santa_baby_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c397c9-b1d7-4649-8559-dc3540006211/remember_the_titans_speech_words.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD716 5288 bytes
SHA-256: cb9debe560c8314793a35090a189ca9eaf219361d55c1f58b4d122f93b057e23
font_01_sfnt_off0000e926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE926 10940 bytes
SHA-256: d129d88585dd4e2d68565a1a8096f61e99f327b2e132d5ad29c3224d39419328
font_02_sfnt_off00010ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECC 16404 bytes
SHA-256: 6b87391e999307eadd4127f656885197b2d0d8557de163505903c0d905f2ed9e

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