Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30781391414aa32…

MALICIOUS

PDF

70.4 KB Created: 2020-11-19 00:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 85bcd834151cf0b525172660d5f8886e SHA-1: 22cfe1e4220fafdaa951d1c2332dead525b3898a SHA-256: c30781391414aa32546963706b65fca05d4f660066980dee151c20ddb6d6d28d
162 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 designed to trick users into downloading cracked software. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of a malicious URL and the document's likely purpose of phishing for software downloads are sufficient indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=fxsound+enhancer+13.024+crack In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404497/normal_5f96967b35a17.pdfIn PDF document text
    • https://kuvanipugeva.weebly.com/uploads/1/3/4/4/134445248/146df9e618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371269/normal_5f8a741111c34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408180/normal_5f944eba9988d.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/8e1ac672-fd08-4a4f-a40d-d1c002204cb9/kimanasixapenegimizimaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6125f9-c5a8-42e7-9955-daf21b526436/93959989080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1811722-69dd-4b29-8549-8155c97cde2a/lenotulomaviguwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3841cf-da19-47f2-8143-b555cf169d76/59466467781.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_off0000d480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD480 5692 bytes
SHA-256: df019f1c58a3bba31789ff6424563c682564629a1edb3f89946f1511348cbc50
font_01_sfnt_off0000e7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E9 11064 bytes
SHA-256: df9274bcf436d37c0d9d4cc7a796e28de7ede8dff2963df7c74984f1257d993b