Malicious PDF — malware analysis report

Static analysis result for SHA-256 5897646aef13ecda…

MALICIOUS

PDF

72.4 KB Created: 2020-12-28 08:59:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: cae523b2199702f036faf08b2a8bf4a3 SHA-1: d814908ec87afb4ef96d0890c79ec83fe51ddf36 SHA-256: 5897646aef13ecda7c4cfd96ae9ed8573cd5c8090bcc1e529a76e0d03ca980e6
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, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were extracted, the embedded URL and the nature of the heuristic firings suggest the document's primary purpose is to redirect the user to a malicious site.

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://traffine.ru/aws?utm_term=brightness+control+apk+for+pc+windows+10 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5fcdf0ef80f0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393208/normal_5f8e4615ab666.pdfIn PDF document text
    • https://cdn.sqhk.co/wirujurumugi/ijbkfhh/warpath_movie_1951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f9cd1b8d2ff3.pdfIn PDF document text
    • https://zisatusomet.weebly.com/uploads/1/3/4/8/134872515/553b96831b7.pdfIn PDF document text
    • https://cdn.sqhk.co/kivuwutu/jiVmgjd/bike_race_bike_blast_rush.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_5fbdd3ad4268c.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/f7d372a0-85ef-420e-919e-31cfe5225b28/virginia_tech_irb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e21f821-4b49-4120-92a2-13a5957aac98/john_maxwell_360_degree_leadership.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae2e02af-54d9-4d3e-a270-da7f43592229/56722356927.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_off0000dcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB0 5816 bytes
SHA-256: 8ec5dab41feae50b153d1743076850fe62b6416e8e1a413d6355d6f164036ecd
font_01_sfnt_off0000f09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09D 10496 bytes
SHA-256: 48f196c86456a6b9800d685f7c671d11be5562c4afabc9881680b33dc055966e