Malicious PDF — malware analysis report

Static analysis result for SHA-256 054d0f7f6116d05b…

MALICIOUS

PDF

72.8 KB Created: 2020-11-20 08:21:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 38f529279541cf31bfc9ad9cf0cc7185 SHA-1: 93b9bac62f469b187988cec854e117d5d79c033c SHA-256: 054d0f7f6116d05b0937d61f54c0f304d661a1fe8b003bfb77e7ff1791e423f4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=donkey+kong+country+3+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418796/normal_5f95a89dda7e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5f88673e14d2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385014/normal_5faba1f297dc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411709/normal_5fa53ec664ef5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f8737e55ba4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443342/normal_5fa6b69a22b14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412575/normal_5f95784b879c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f88dbd2a5f83.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/fakefata.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379222/normal_5f94d766420c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415073/normal_5f94996b69d25.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/2b93f11a-bb8f-434b-9670-566606079183/97641379006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d23446d9-4391-453f-895a-773dd357a4cb/xazigefeziderizo.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_off0000debe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBE 4908 bytes
SHA-256: 0ff65468a4e85c735fd3f77e97b201bae166f65dd603c62e1f5e4d0fd9a43e76
font_01_sfnt_off0000efa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA2 11164 bytes
SHA-256: da1c33c5cd0b0eb5f98c61b4f758be47f3bdcfec65f9dbe1a6474cfb67e82477

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