Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfd97deae865aff…

MALICIOUS

PDF

96.6 KB Created: 2021-02-17 14:25:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 32e8ab65cfb2e1413c6774d348f1ec40 SHA-1: a8537f26ac4072be86a5f19d02faf235844328a4 SHA-256: dcfd97deae865aff8927a881a9133d509e1ada3c31a6105fe24d0784c85ad013
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is also referenced in the document body as a search result for 'Utada Hikaru First Love'. This indicates a phishing attempt to lure users to malicious infrastructure. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wix?keyword=utada+hikaru+first+love In PDF document text
    • https://cdn.sqhk.co/joziroluxu/JjjkHPe/10466905649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467945/normal_6015f174e47a1.pdfIn PDF document text
    • http://dimax-matrasy.ru/australian_medicare_card_number_formatv1gg5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421788/normal_5fd73b36c0aa4.pdfIn PDF document text
    • http://copyright-security-ig.com/gadudidonuluwloc9t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421614/normal_5fee998396cd3.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/bieJ1jh/tidaduzuxusefol.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/bheRNm2/78213314647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449781/normal_5fe96d9eea9aa.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/fekife/jifexokaxeburit.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/korean_drama_app_for_android_box.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/basic_english_grammar_test_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/neonatal_resuscitation_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/pittsburgh_pennsylvania_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/22429088500.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10129 19624 bytes
SHA-256: fbeffa7dd5d9cb189c889911ca9e117fad7cf4bf2925491e9db09087fc4dfa0e
font_01_sfnt_off0001405f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1405F 5108 bytes
SHA-256: aa68b691f21eb63dd1567cab8a39c0663989c1c9baee4e914f8ceb3b3cefb351
font_02_sfnt_off000151c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151C5 10264 bytes
SHA-256: b2f5634ee8adb66b97e7cf71b224e7e0f3b08f71547b91d58306c46e6a45fb34

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