Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45a6f216bc352bb…

MALICIOUS

PDF

67.6 KB Created: 2021-01-22 22:38:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1261886071085fa56531defcea8f58a9 SHA-1: 8a39def57bff8442d61965ba5e6e0dab75a00f10 SHA-256: b45a6f216bc352bb123d9b5b700f8943807e5a26eb1ad0648ad68251e3ad9809
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it's a malicious redirector link pointing to 'https://traffine.ru/aws?utm_term=netbeans+java+tutorial+pdf'. ClamAV also detected it as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The presence of embedded URLs and the ML classifier's high confidence score suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffine.ru/aws?utm_term=netbeans+java+tutorial+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4410016/normal_5fe530e0c10c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408983/normal_5fc9b06705b12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450634/normal_6005cc8e86e5e.pdfIn PDF document text
    • http://vifijes.22web.org/16767437804.pdfIn PDF document text
    • https://site-1178201.mozfiles.com/files/1178201/kuxubuvasasuxeke.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/woxojuxafopuv/97211007087.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/workout_timer_for_android.pdfIn PDF document text
    • http://nejexapef.rf.gd/kaspersky_antivirus_free_full_version_2018.pdfIn PDF document text
    • http://kakogajoxe.epizy.com/4777678764.pdfIn PDF document text
    • http://zaxukesaludu.epizy.com/upper_limb_muscles_anatomy.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_off0000cb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB67 5280 bytes
SHA-256: 1ebed160c687cd0f148d314835b8b45ce85206dbfc5d145fbe8a264ce3378dfb
font_01_sfnt_off0000dd78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD78 10680 bytes
SHA-256: f6ad7848836209b58211659858eab814628999ed48589820eef547cf8409a57a

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