Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a15256b58dcbc0…

MALICIOUS

PDF

69.9 KB Created: 2021-01-08 02:12:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 450af5807c74d56e415c63454cf22223 SHA-1: bc49582cf74376e3a9672941907f8d24b1136d68 SHA-256: c2a15256b58dcbc087ae5384fff97c57ba0b1111e97044bcec9651d38616d51a
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which points to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

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://trafftec.ru/123?utm_term=reiki+master+teacher+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415782/normal_5fa8db80e1b32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_5fb998d1f01d3.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuwemiromi/idIEwjh/setenoboxanowosus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476593/normal_5fcfa8e52af79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_5f893b3369afc.pdfIn PDF document text
    • https://cdn.sqhk.co/tifesiwafo/9IhjGjj/vinujijaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389568/normal_5ff4d609958b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416154/normal_5f9bae1aa4b09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411218/normal_5fbdf8116323d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369928/normal_5fa75b6a2f331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479445/normal_5fdd5ad830925.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/gjihWgR/tarut.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/xafaxotaful/jukozumeluxijuvin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9abcc3b6-f6aa-4a76-9c84-d8d25f80d9f4/87670854358.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_off0000d3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F8 5112 bytes
SHA-256: c4e3b3a15dc6dc142499113b115e3f3a23caed60bd4858d0df9e0f1613a91602
font_01_sfnt_off0000e52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52E 10936 bytes
SHA-256: b6ba4eeebff148c221abdd14b367c792b0887f6e92e5b99f4caac89ad8cb09f5