Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a0ce3794639ca8…

MALICIOUS

PDF

67.9 KB Created: 2020-12-11 01:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 126f6b965392245d7cfe1521904f4b4d SHA-1: e8ab8354d56337f1704282124f30b9e88971b5ac SHA-256: 63a0ce3794639ca8e835c2917148fba9b74bfd9877d0a86d6da79c23fb5549b5
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The embedded URL 'https://traffking.ru/wb?keyword=arithmetic%20series%20worksheets' is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector suggests an attempt to lure the user to a phishing or malware distribution site.

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://traffking.ru/wb?keyword=arithmetic%20series%20worksheets In PDF document text
    • https://kikitepolo.weebly.com/uploads/1/3/4/5/134514310/3655324f.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/gogigukigutal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385647/normal_5fa66e527a084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450507/normal_5fa12bad87c7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465403/normal_5fcbf991dd8a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374542/normal_5f8d28af3b5f8.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/fewifuwu/blind_man_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73eb8e94-36ba-4ad3-b202-cc3fca9340b3/musically_followers_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b95cd0-3a71-44ab-8779-391cc8ab8fa7/rokuvumajuwag.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/15535025533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc9eff8-15e1-4849-89a5-ef6627edfa9c/welcome_to_camp_nightmare_goosebumps.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/18182755565.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_off0000cc26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC26 4940 bytes
SHA-256: 5614359b856fcf9d714a1d2800fd1f26548fb0e5584ca608d912a82503937c75
font_01_sfnt_off0000dcdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDF 11244 bytes
SHA-256: bf8798a9993fe63fc25600eebc532d42dee247e6ea0464bccc9ee82a1623f2d6

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