Malicious PDF — malware analysis report

Static analysis result for SHA-256 191c5ecf8d409678…

MALICIOUS

PDF

68.8 KB Created: 2020-11-16 23:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 382e6807122212c7f68bdf420128d930 SHA-1: 19ccac7fa5f57833084adfc7dad47335f92cd80c SHA-256: 191c5ecf8d4096783e89a45905dcc22f1c424f136cdf68fb568a382ec3da3e26
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. ML classification also strongly indicates maliciousness. An external URI, 'https://traffnew.ru/strik?utm_term=buz+ve+ate%25C5%259Fin+%25C5%259Fark%25C4%25B1s%25C4%25B1+epub', was extracted, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and embedded URI point towards a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/strik?utm_term=buz+ve+ate%25C5%259Fin+%25C5%259Fark%25C4%25B1s%25C4%25B1+epub PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f8b28623125d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392656/normal_5f98679fb5947.pdfIn PDF document text
    • https://xutomanuvafara.weebly.com/uploads/1/3/4/3/134345830/nulugujezipixepopeso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5f9cf55fd943a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413570/normal_5f97685f6bad1.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/misubafuxupomuvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f8bec3676726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379483/normal_5fad578e1226a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f8796b7ca752.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/jebokizez/sobemewobonanudav.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/39957542364.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/617_area_code_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc0ed52-37c0-422e-b492-15c32d00c437/86352125563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd299c35-615c-4bf6-8121-61bd8c68df0b/rallye_de_baretous_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd03c80-4a27-4b8a-915b-82c475491f2b/sugebadejulisovexukefur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcd68ead-665d-40c2-b05c-33f08a0e17e6/robebujigikikuwip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fdaf641-7781-475f-93f5-9c03cbba3cf4/xuxurevalaraxuxutagibus.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_off0000c8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FB 5424 bytes
SHA-256: c556ab2008c44b9da3e1cbf10c82a6bb969a2103cc3118aab5d715d596868aa3
font_01_sfnt_off0000db0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0F 14348 bytes
SHA-256: bce38813d86cb7fabce23e2633085fdbff62571bea42b3b05067f16c8330d69a

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