Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ce33373c295372…

MALICIOUS

PDF

79.6 KB Created: 2021-01-10 18:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 65372624c93fa76ca35a35078cd0239f SHA-1: a46016050c35799c209078ee9c5dea301d5e5454 SHA-256: 67ce33373c2953722c47bc2d5cb95401c6a0e21902edbaacf89c6746993c0e6d
104 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://trafffi.ru/aws?utm_term=free+online+lesson+plan+templates+for+teachers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449627/normal_5ff75e640dce9.pdfIn PDF document text
    • https://site-1178726.mozfiles.com/files/1178726/spanish_course_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/ifiajf5/valenti_mystic_ct_hours.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420915/normal_5fce32116a7ae.pdfIn PDF document text
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/setunofegox_luzukodex_luraziromami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460055/normal_5fc220f910966.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403556/normal_5fce89f50478c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_5f8c4c8ca7926.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/fadobirak/mosozar.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_off0000fa86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA86 5208 bytes
SHA-256: a89927caac73bd82e1e425580c2da6e448fa32cf1af16929a12cd6816b7834b5
font_01_sfnt_off00010c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C13 11008 bytes
SHA-256: 4a8287480589e521a9a29b77d7bbd00c5131e9762f76fd61f0400d09ee235f7c