Malicious PDF — malware analysis report

Static analysis result for SHA-256 03eae626da974891…

MALICIOUS

PDF

59.6 KB Created: 2020-12-10 08:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 715f28fbfde64f267d67e3e1a14755c6 SHA-1: 1780aa819fe7e671e293539e8a3d66ae855e653e SHA-256: 03eae626da974891dbb53425cfbc2dfefd6a58d96f0eb2875a1752efc5fee49d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to suspicious domains, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to "the lord our god chords pdf", suggesting a phishing or malware distribution attempt. The presence of multiple external PDF links indicates a link farm strategy to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/strik?utm_term=the+lord+our+god+chords+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f96686c2c1a3.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/576ff6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403418/normal_5fa0501d3a80a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498345/normal_5fc876fbaa67a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_5fa5c4f983f77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_5f9a071ec69f9.pdfIn PDF document text
    • https://pagelenabiruzet.weebly.com/uploads/1/3/4/4/134462778/tanajaxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482413/normal_5fbd240032366.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/33d13539-eb0e-4b27-ab83-2d31d033dc16/is_asphalt_sealant_flammable.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_off0000ad18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD18 5156 bytes
SHA-256: 0b819f7414aa0081a65e341a6b9d8d50e02ed455364dee906cc8f453d0703cee
font_01_sfnt_off0000bea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA3 10392 bytes
SHA-256: 8836afeb3a39601e6cbff192d1da44f2d4b1969379f25e0b66dc8c17a57e1af0