Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0be97cca2b9d8c…

MALICIOUS

PDF

66.2 KB Created: 2021-01-14 22:39:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 66cf5fb0282501c52d38e67f53d9aefc SHA-1: 86347bf21f99571f13bb205c84ec04513ae15211 SHA-256: da0be97cca2b9d8c18f31314c0758baa9b3d81c5530b61ce1c4aaffab6d03f6c
96 Risk Score

Malware Insights

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

The file was flagged by a machine learning classifier and ClamAV as malicious, with ClamAV identifying it as a phishing trojan. It contains an embedded URI pointing to 'traffnew.ru', which is likely used to redirect the user to a malicious site. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL and the high confidence heuristic firings strongly 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
  • 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://traffnew.ru/123?utm_term=bash+case+statement+break PDF link annotation
    • https://cdn.sqhk.co/disonixures/PSibuhg/cnc_machinist_salary_mn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_5fab7542bf9f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410954/normal_5fbf94bc2e71d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501789/normal_5fcb3952402e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387233/normal_5fe2b4eee5695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_5fc2405ae34a9.pdfIn PDF document text
    • https://cdn.sqhk.co/samivegin/giaLisS/69065906738.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/id77Hpq/jeteragodiser.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_5fbb3dc32da40.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/wenobagupexekap/cover_letter_template_new_zealand.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_off0000c46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46D 5260 bytes
SHA-256: c25fd758c693879b6da47b6052afe7a68180d9e27281cd600342da5b16a5bb42
font_01_sfnt_off0000d623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD623 11256 bytes
SHA-256: beee167b7a78ed41a0cc8ad3c24f7b4206e9b754a2d0f5f643b1efa264039910