Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa05541cef633fdb…

MALICIOUS

PDF

64.0 KB Created: 2020-12-11 12:12:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2666c32277d60eb06933d7cdd22b9be3 SHA-1: d89b6be6995e3ba7ad1cc5aaea9859c635a721db SHA-256: fa05541cef633fdb85c830d320011433c407113db2dd0c295eb0b1713915251a
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/strik?utm_term=accidentally+in+love+counting+crows+video PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4423452/normal_5fc4ae4d795ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417305/normal_5f9e4df9e323e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5f923314f23e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487007/normal_5fad700f81a9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_5f9448b59f92a.pdfIn PDF document text
    • https://gumebasa.weebly.com/uploads/1/3/4/5/134509515/lusozejofono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411252/normal_5fbf2504dcb9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427785/normal_5fb86a39132ce.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/eafe7d4f-6539-4d5a-a4ec-0af7fbed5e9a/a_arte_de_falar_em_publico_stephen_lucas.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/bhc_stock_earnings_report.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_off0000bc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC20 5352 bytes
SHA-256: 15336848620162072a0a81a7dfbea0a960e7913162e1de22acc9b42d5d91ef68
font_01_sfnt_off0000ce7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7E 10744 bytes
SHA-256: 9fb8596c58b377b16dd2684317d4aa3fd8c1457b23fbf1fa0b200bc21764c6ea