Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee331540047fb2cb…

MALICIOUS

PDF

79.1 KB Created: 2021-06-07 10:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3dee21d42c7a80a0347ea9ae63690b84 SHA-1: 970c9e96ecf016a21556a58fc65e351fb3c3605a SHA-256: ee331540047fb2cb16041c852976bc98c8b0fcffe2fc76c1d41a8a73ac3489da
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'ketchas.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, appears to be a lure related to a 'logo quiz'. No scripts were extracted, but the presence of external links and the detection signatures suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://ketchas.ru/pbw?utm_term=what+is+the+logo+quiz+answers+level+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445868/normal_60342b7e979e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_600aaac76011a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372955/normal_5ff5ba10da4f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486982/normal_6041194a38d0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414672/normal_5fcb119bdb68a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457849/normal_5fe3516f55cc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449768/normal_606911c51b4cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481663/normal_5fe2ce350d9b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471706/normal_5ff367b8a787c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410191/normal_6013a6765fcea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_60660df08867b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369779/normal_5ff58ff337fb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415518/normal_60301a3a48632.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407777/normal_5fce56d3be673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491670/normal_602c93c60a3f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427799/normal_60597316a6ab1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445864/normal_5ffd3e4d0aad3.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/c8944509-91d5-48aa-a5e1-3ec6a2d72b05/tutegeliresikakexasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07e3f567-d5b3-4c7d-b78a-d5cb25fbc9d1/tixof.pdfIn PDF document text
    • http://munonoraze.pbworks.com/f/5539087045.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/f/24503477279.pdfIn PDF document text
    • http://guronavageba.pbworks.com/f/what_the_number_10_mean_biblically.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e25f6010-f07c-474e-bf31-222ec352a9b1/tunob.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_off0000f71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71B 5420 bytes
SHA-256: 43fd888161b69a61aad67687e85631fa36f8a4f673af6123183f49d32ba88f5e
font_01_sfnt_off000109a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A5 11204 bytes
SHA-256: 6c616ecdccdb14c4eed14c08e1615f9d39eb248322e42d928713c8c1f7022975

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