Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8f06483963940b…

MALICIOUS

PDF

67.3 KB Created: 2020-11-17 06:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a5bfbbd982adf1702de9da8a1ed41210 SHA-1: 1c4775e580474c4749fc725f34e5cbfdf9a0247f SHA-256: 5e8f06483963940b9a26390fa6357c864b0bedc6e7804a7264edb11cc05f7f1c
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by a ML classifier and ClamAV. It contains an embedded URL pointing to 'https://trafftec.ru/123?utm_term=plural+noun+of+synopsis', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a 'synopsis' 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://trafftec.ru/123?utm_term=plural+noun+of+synopsis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444123/normal_5fa1ce4322e90.pdfIn PDF document text
    • https://sutowuvo.weebly.com/uploads/1/3/4/6/134685384/248195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379045/normal_5fa516cb6165f.pdfIn PDF document text
    • https://resumasilazivo.weebly.com/uploads/1/3/4/5/134509929/965250e66b3.pdfIn PDF document text
    • https://rofofomigedug.weebly.com/uploads/1/3/4/4/134486696/7ac45db.pdfIn PDF document text
    • https://mijawogutudegi.weebly.com/uploads/1/3/4/3/134374589/ac34a9dcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489722/normal_5fad4b585f117.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/2084211d-8792-47a6-8181-0e119a9be17d/7072691338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/595ed9bc-c3f6-4140-9a73-162b8c112985/zubopesegepivosuzaze.pdfIn PDF document text
    • https://s3.amazonaws.com/potevip/49643693641.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/pavufukuporodebugulesulo.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_off0000c93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93B 4996 bytes
SHA-256: 8733f73685622b7956b0e70af2ec632a17ec40c0d1057bdfc91675ef833f3769
font_01_sfnt_off0000da54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA54 11416 bytes
SHA-256: 66c1af1dfc1413bc88b1da18f0dad1b6d6c0263851b47b5927ca4d130da9b072