Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e9e5bd83230529…

MALICIOUS

PDF

73.0 KB Created: 2021-01-31 23:55:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dabeb95247466220e76f7d5b48bd9c8a SHA-1: 70097319c33fd7bca4655ec3a468d15d71053aa1 SHA-256: f8e9e5bd83230529e05ec5b093295474c3b4061a42fbb1e0d71342f7e16cac79
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'crophysi.ru'. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site, likely for phishing or to download further malicious content.

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://crophysi.ru/aws?utm_term=renault+performance+parts+south+africa In PDF document text
    • https://static.s123-cdn-static.com/uploads/4443803/normal_5fe083dca4ac2.pdfIn PDF document text
    • https://cdn.sqhk.co/butaliwe/bHijwvs/tofukuvo.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/7PpYQhg/57055544051.pdfIn PDF document text
    • http://lisolu.org/soxuwebogowucnor2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_5fe9eb520130c.pdfIn PDF document text
    • http://genoray.pro/arithmetic_math_book_hindiugaz5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451375/normal_5fdebb574001e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388421/normal_5fc747fe2c020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402721/normal_5fe93cf0d24a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370543/normal_60077aee58692.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/Wvihc7Y/ice_galaxy_s7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://devepovamijube.epizy.com/cupid_and_psyche_book_report.pdfIn PDF document text
    • http://titarejidawe.epizy.com/bhoothnath_returns_full_movie_free_720p.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_off0000e042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE042 5260 bytes
SHA-256: da21d4154c8c92466417465581c48035a0367149c84f829bec958203d41e6684
font_01_sfnt_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 10668 bytes
SHA-256: 08556b6561dba9c4334545308575b4c318144ce9cb98ef3cefdd0023b05f51d1