Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9306eb1549ba4e6…

MALICIOUS

PDF

73.0 KB Created: 2021-01-17 11:14:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 46b1fd28bef3a6e85d41179cfd077ce2 SHA-1: 662e6865a811f640fd85f23e1635a8673010e89a SHA-256: e9306eb1549ba4e6095a114c03f86c59bb92523c4564c6e895d80a908334ce14
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically 'traffking.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to academic forms, suggesting a phishing or credential harvesting attempt.

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/aws?utm_term=bsc+computer+science+du+form In PDF document text
    • https://site-1168194.mozfiles.com/files/1168194/40255689690.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/idjh5jc/detective_story_books_in_tamil.pdfIn PDF document text
    • https://site-1193467.mozfiles.com/files/1193467/lofitozidudigonisi.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/hgjidKU/3505707661.pdfIn PDF document text
    • https://cdn.sqhk.co/razupojoja/Djazosk/23223399356.pdfIn PDF document text
    • https://site-1204510.mozfiles.com/files/1204510/paris_metro_map_zones.pdfIn PDF document text
    • https://cdn.sqhk.co/jisanipu/ciiVieE/bowling_paradise_center.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxiniraz/sMhcEjp/yellow_lightning_mcqueen.pdfIn PDF document text
    • https://site-1177098.mozfiles.com/files/1177098/blockman_go_login_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/nurafurofopu/yyngd2S/48297286799.pdfIn PDF document text
    • https://cdn.sqhk.co/vovusupa/ehiJjcr/33295151362.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/gggjEjv/teacher_salary_per_hour_in_california.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_off0000e0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AE 5108 bytes
SHA-256: 2dff865f4886b777aec18a0420855055d1976ed081ed42a53948420dad8e87d5
font_01_sfnt_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 10980 bytes
SHA-256: ff7bd1375ef9a0be4ec089a6141e95619143ffc53151840dbb84cbb021917deb