Malicious PDF — malware analysis report

Static analysis result for SHA-256 3170f9f04f5213a3…

MALICIOUS

PDF

71.0 KB Created: 2021-01-08 15:22:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3c38e5c27b93b608ac69f963d926f606 SHA-1: 9c51a5000557aceb58d0eab8c7f78d6972ef3ab3 SHA-256: 3170f9f04f5213a33d1d9c9d678800d70fb6f6f29938bd496d85bd1d956c88af
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://traffset.ru/123?utm_term=electron+configuration+worksheet+high+school+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471250/normal_5fd064a9909f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487625/normal_5fe286ac330d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414868/normal_5fb46256bbee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417405/normal_5fc2bc7a53262.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/nitamexagodefegomuka.pdfIn PDF document text
    • https://tinalolovini.weebly.com/uploads/1/3/4/3/134371967/2240134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_5fafb3d4162b0.pdfIn PDF document text
    • https://tunupufimudodo.weebly.com/uploads/1/3/4/3/134324073/gimopikeka-sinopetugafurug.pdfIn PDF document text
    • https://butebipibib.weebly.com/uploads/1/3/4/2/134265815/ea9f66f5086.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb5d9894-ca1d-4593-86a6-6fdae736e118/16347848715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbdb8338-4a35-43e5-8fc0-e4d1edd491e8/fidabefasaluw.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_off0000d989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD989 5532 bytes
SHA-256: 6f1772753d3d50cb6a175f498b2a374327bb0cf127f7133e15ee14e2b7fb350c
font_01_sfnt_off0000ec6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 10140 bytes
SHA-256: ad7fa9fa0fd3f63f36213a4b6ecb7e2bfa33448ad243ce045c2380dd7d11dfc9