Malicious PDF — malware analysis report

Static analysis result for SHA-256 275dfdc015f10b22…

MALICIOUS

PDF

65.4 KB Created: 2020-12-25 23:33:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 08f6a6f2ef8c53a082cb98ec4185a4e8 SHA-1: 9a1d571f328a7d118f428ad0f05608edf5644f60 SHA-256: 275dfdc015f10b2297a5f41c939bf5a1de77d83304a61d0c659953a66ee9d938
104 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate the presence of an external URI and urgency-related language, suggesting a phishing lure. The ML classifier also strongly indicated maliciousness. The embedded URL, https://trafficel.ru/strik?utm_term=gcc+bookstore+contact, is the primary indicator of a malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/strik?utm_term=gcc+bookstore+contact PDF link annotation
    • https://cdn.sqhk.co/neguvobipa/Ng0hahd/37435132583.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/gdguxX9/32495478095.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/zirojopemup/kekawesokoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/127fa287-4edc-4344-a2ee-3fd83f0b1f4a/avengers_google_drive_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba75764f-35c0-4840-a263-207205cbb434/tend_secure_lynx_indoor_camera.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/15340269868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba40976-a850-4e14-a165-1e6ad7764e15/jezeroji.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/mathworksheets4kids_evaluating_integers.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/62043799573.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/kixakisorexifo.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_off0000c41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41B 4996 bytes
SHA-256: f80a6560e722cafcef6fac5bb4d3057ec1f3e8ba6f032b6788322bdde3fa9ab6
font_01_sfnt_off0000d52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52F 10560 bytes
SHA-256: 1e72046984052031930b7bee119d1d23ebc5361103c0e99b8f2e378d9e30923d