Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9eef21e65aee20c…

MALICIOUS

PDF

100.4 KB Created: 2021-01-19 00:11:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: df08d3c89bc61ddc21622f0f74c822df SHA-1: fe3b9b13ffc731a699bad6fad52c494cb24fb15c SHA-256: a9eef21e65aee20c23e506e259c0f8ca3ae9d72fbf25ca21a6341c1cfde46342
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=lego+technic+parts+list'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?utm_term=lego+technic+parts+list In PDF document text
    • https://site-1171112.mozfiles.com/files/1171112/xegejidakafopodasomavoru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491436/normal_5ffccea3a55a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_5f91ea10c9470.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/emBhcv4/zubepatasoj.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/jesidofefe/zunureromosikuvaz.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/shark_dichotomous_key_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/39329830800.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/majapivejukebol.pdfIn PDF document text
    • http://tiguvazigavis.epizy.com/nixosebatezivirobofa.pdfIn PDF document text
    • http://guxozuzemonixe.epizy.com/28254702027.pdfIn PDF document text
    • http://revifobatuge.rf.gd/lafaboto.pdfIn PDF document text
    • http://livufuxe.epizy.com/1646823903.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_off00014a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A88 5136 bytes
SHA-256: 92ef0ee5dfc8ac8aa05a38abaa7409191080c7a29ee45f07d852b7a1251feced
font_01_sfnt_off00015c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C02 13008 bytes
SHA-256: 28733c0456badc7e2f11678449000efec8f4f3fd979f46353bcd50fd6e575f30

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