Malicious PDF — malware analysis report

Static analysis result for SHA-256 774675438f05f2e7…

MALICIOUS

PDF

74.6 KB Created: 2020-12-28 21:12:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 34853ae2fc5ecdef6326860f5a104f90 SHA-1: b8da0fb351f7d1d1e3c84c3e62816310d55bfaea SHA-256: 774675438f05f2e76d0b84597855b45a98c3aec560202217931628605308d2a9
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading a malicious payload. The presence of a 'download' lure heuristic further supports this phishing attempt.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/aws?utm_term=ks3+electricity+worksheets+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470677/normal_5fa4f63db2471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_5faefc699db56.pdfIn PDF document text
    • https://cdn.sqhk.co/lodesejidi/RQqD5TJ/super_brawl_universe_apk_obb.pdfIn PDF document text
    • https://sakuvida.weebly.com/uploads/1/3/0/7/130775714/4cf0ff12f6c1e3.pdfIn PDF document text
    • https://sadozilodefizon.weebly.com/uploads/1/3/4/6/134659806/9509031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466664/normal_5fb756b797636.pdfIn PDF document text
    • https://cdn.sqhk.co/muxigatatini/cjbk6jb/tic-_tac-_toe_family_christmas.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvotalek/J17QQgh/35062239103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448538/normal_5fe26af708821.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fapaga/29822192974.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/zalarudinusoniwosumegosut.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/wuratekuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/goodbye_stranger_book_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/62994940446.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC576 5104 bytes
SHA-256: c3400d7e465ff3663708b375fde17511b037430ac1c4a0d75ebb6336f0ced59b
font_01_sfnt_off0000d6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F9 10324 bytes
SHA-256: d517c79c4e5d0858d8ff941eb9ba34e3f3dd6699ba78bf4aa5017bbb1350d8e5
font_02_sfnt_off0000fa87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 16088 bytes
SHA-256: 7ccd8150e2c48a9748994740f2a0713563e2bc66516285f786c138bc0577823a
font_03_sfnt_off00010f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F46 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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