Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f7fc9529d604af…

MALICIOUS

PDF

70.3 KB Created: 2021-02-28 19:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9af2ae174bffd6ce25168bfa084070fd SHA-1: 5ca95974dba3f1310f85be14d08f104635199058 SHA-256: 62f7fc9529d604af30ce1d889f7af4e3dbd1e212d0b18500b0e6fbeed5ce101b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall heuristic firings point towards a phishing or malware distribution scheme.

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
  • 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/strik?utm_term=trane+xr90+red+light+flashing+3+times In PDF document text
    • https://xapunuzut.weebly.com/uploads/1/3/4/6/134683745/4490767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428078/normal_60163980e2b6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386822/normal_5fd7fac839033.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367311/normal_5fece83f0d280.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387233/normal_5feecd47886c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383925/normal_600498c96c318.pdfIn PDF document text
    • http://swast-group.website/8443994749vlato.pdfIn PDF document text
    • http://flymoney.net/mozepikiwwkwy9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koxolavomuzo.myartsonline.com/how_to_insert_text_in_pictures_ms_word.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/xepovowizomar.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_off0000d66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66C 5800 bytes
SHA-256: a44816ff43fc25edcf5c44d12ecbeaece5e0f5bfbbe46bf643f2012ea8d53314
font_01_sfnt_off0000e9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FE 10132 bytes
SHA-256: edca80ef485c0a3277e654c443ee4085553646586c470d916315f7bfef3d54af