Malicious PDF — malware analysis report

Static analysis result for SHA-256 35008599f57a39a6…

MALICIOUS

PDF

75.5 KB Created: 2021-05-28 04:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03d8e6dc79bffac7a468d3df7f457db0 SHA-1: 9af9aa73e4ac2c18c6ec0a960008455e3437e489 SHA-256: 35008599f57a39a687502e75b30f8c822537a9886f66f0b4c4abffdcd57b79c7
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malware or providing sensitive information. No scripts were extracted, but the PDF structure and embedded URI are sufficient indicators of a phishing lure.

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
  • 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://pelibifir.ru/wb?keyword=pharmacotherapy%20handbook%20tenth%20edition%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501975/normal_5fe00cfa69430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372384/normal_6009bf4386b00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406777/normal_5ff29650e2260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379613/normal_5fe94cd2ee1da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475375/normal_5fec8d7b4ab6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493876/normal_5ff0c8e05a1d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502698/normal_6023ced1a3a85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449627/normal_5fdafbc23d941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472213/normal_6064a8426078d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391047/normal_602b4751907fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502246/normal_606b75e3663a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445869/normal_5fe2293f38012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_603149736b691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455196/normal_6051566a74e26.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/fb5bf626-7147-42dd-b7c7-dd12682034c5/81080276001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6341314d-baff-4252-ab91-c37a8d30b2f3/75673983175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39bb8247-ccf2-4974-bf37-adaccb1ddf79/fopasumabelowotupojofuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bace10b4-b506-428d-90e0-4bf3e22876f1/the_oxygen_thief_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1449485a-db7e-4506-bf48-811163325821/50906236005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a62014c-1929-4860-a604-96e983161e7b/voxixufiseporupagib.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_off0000e8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 5492 bytes
SHA-256: 188e047d1e986e1b6908033d2b1d7413327c5ced5d835e5a6154c8db70df51de
font_01_sfnt_off0000fb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3F 11036 bytes
SHA-256: e323282ea4d57ff527e75fe08ea615d0a721effe3a4bafdf73bed5d58c8b5d70

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