Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7260952450b505f…

MALICIOUS

PDF

167.0 KB Created: 2021-02-12 11:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1e063648714704e7b23e008ac6090caa SHA-1: 371ae66a16e3ad39fded6824dc6980122a0c421b SHA-256: c7260952450b505ffe35d015e2c28e4e0dac66ba8990312d5419ca669f037626
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, indicating a phishing attempt to lure users to a malicious site. The ML classifier and ClamAV detection strongly support this assessment. Although no scripts were extracted, the presence of malicious URLs suggests the document's primary purpose is to redirect users to a potentially harmful resource.

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://yafferge.ru/123?utm_term=parallelism+practice+worksheet+elementary+school In PDF document text
    • http://nesobaka9.xyz/24866586635rrigl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374983/normal_5fdc4b3bc74e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460970/normal_60073aac7d1ce.pdfIn PDF document text
    • http://extrameets.fun/xunedifasemaa573n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426822/normal_5fe015f6f3949.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407986/normal_6006335b36611.pdfIn PDF document text
    • http://naturfresh.fun/gupopex7kfpd.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/hjgfjbS/xogefugexufilulikaxifumut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/rokesunes.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/30039070932.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/64414678256.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/black_belt_memory.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_off000257fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x257FC 5432 bytes
SHA-256: faf8980cf2fb1f5a04f7d9fd515b040a2249a33f81e09eadef6d18ebd5ddcf5d
font_01_sfnt_off00026a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26A5A 10732 bytes
SHA-256: 00bf22d7c039288797819b4a31af10d78d0640fd217bc4105d587d34450cde76

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