Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b01d52004465b5…

MALICIOUS

PDF

72.1 KB Created: 2021-01-02 14:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 38868260025f0c2b83f128333326d8d6 SHA-1: b7319165462af4d2a2bb1cfe702586e4cb4f84bb SHA-256: a9b01d52004465b59f5cea87e005d42de5b03356ce15755c6623943ca4e98d39
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link and a high-confidence ML classification. The embedded URL points to a known malicious redirector, indicating an attempt to lure the user to a harmful site. No scripts were extracted, but the presence of the malicious URL is sufficient evidence of a phishing or malware distribution attempt.

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://cctraff.ru/aws?utm_term=vesicles+and+vacuoles+formed In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378843/normal_5f8de4977dafb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445115/normal_5ff049317ef56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412151/normal_5fd0a3e7bf27d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412573/normal_5fa01b91f2d6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_5fe84ae072c3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f9ab91dbcb77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458616/normal_5fa852f1f2dda.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/0a2501df-83f7-4d34-a539-fb2c613bb7db/datotuguxesunutibo.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/b_el_ed_du_forms_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/formal_command_conjugation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7114c70-ce3b-42a3-8d12-fcb3622a2c20/67993361690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7827ba7-2fe6-4548-8a26-672f51a87dd1/rajiguwibefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/494d40aa-6ad1-48f6-b594-ad8118c49bf4/glencoe_virtual_lab_physical_and_che.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_off0000ddca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCA 5192 bytes
SHA-256: 5a540d93b21f06afd4b040efad786cb623bbb07be87b827ffc3d051815783026
font_01_sfnt_off0000ef69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF69 11024 bytes
SHA-256: ab05371af7a9a281448d50da79e010bb5321704b7d6340c63dd6a7c29c455e22

Open this report in the interactive analyzer, or submit your own file for analysis.