Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a1ae884e6efcb0…

MALICIOUS

PDF

66.8 KB Created: 2021-02-23 05:29:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2976cfb41b0813a7c4f68f21f2c31cd3 SHA-1: 985e8edcd3d6200e108341f44cfc590f4f967262 SHA-256: 91a1ae884e6efcb0f517b24ca76f3593dcff37565094312256b7fbb00496cb91
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically `https://druttle.ru/wix?keyword=lotus+tracker+github`, suggests a phishing or scam attempt to direct users to a malicious site. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to obfuscate malicious links or trigger exploits.

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://druttle.ru/wix?keyword=lotus+tracker+github PDF link annotation
    • https://cdn.sqhk.co/nadetajagupe/hih7igB/juwazapolebedam.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/Z3cheus/setebejijazus.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/anqQ4j8/watolivamala.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvifilezaja/iigfCop/mazuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426071/normal_5ff3797cdcade.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/aNAhdgc/pro_series_drag_racing_cheats_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/ihjiQgd/51909437115.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/jchjdG5/fijarujurijadorufamara.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/9gi5R1x/93155009404.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/haNJgit/free_horror_movie_ringtones.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/Cyidhd9/30722464184.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/Ejj5hMR/19640851075.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372085/normal_5feaff585fe16.pdfIn PDF document text
    • https://cdn.sqhk.co/xizefonuma/ya6jhnm/supafudilaz.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/sepotakogovuc38lm.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/hfifj5i/candy_skull_coloring_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460449/normal_5fcb765261a0d.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_off0000c819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC819 5176 bytes
SHA-256: b93cab65d668f9cab4e5658321c31e51c8e2a25257bbb91c856f3e4786729d70
font_01_sfnt_off0000d9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B4 10744 bytes
SHA-256: 396adeba308e91caf4382064429abd321b1e8d485952b660f5d11dc3a2d03d99

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