Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69ace3a1f11dc3e…

MALICIOUS

PDF

62.4 KB Created: 2020-11-25 19:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 01838bbadfbd3d9db7661e5d969fdda6 SHA-1: cc37e03beb912eeaa2f64d568611cd0467d02142 SHA-256: d69ace3a1f11dc3ef9f265a36042a9f925d1148e3918c8576bbd33d0af3ec09c
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by multiple engines, including ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, including a link farm heuristic, suggests an attempt to redirect users to potentially harmful websites. The document body, though heavily obfuscated, contains references that could be part of a lure, and the embedded URLs point to suspicious domains.

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
  • 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=rosen+plaza+hotel+orlando+tripadvisor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468274/normal_5fa8e7e4ce5a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425483/normal_5fb804a205c53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408719/normal_5fbcf3c5dbca1.pdfIn PDF document text
    • https://xidalivukudupet.weebly.com/uploads/1/3/4/3/134319957/zusuvifivu.pdfIn PDF document text
    • https://vejesare.weebly.com/uploads/1/3/4/4/134493146/vopekipika-zesalukup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375703/normal_5f8ea2b4dc95a.pdfIn PDF document text
    • https://dowikonusinewe.weebly.com/uploads/1/3/4/3/134374018/sawarenexowazaxifo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410965/normal_5fa986b2d7833.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/04f691eb-7e7c-4c79-8ac7-2798ec67d90a/ronererivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acabdcdc-b817-4a4e-b6f6-624b758d2220/19911256265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf37fb28-5800-4b9b-a01b-7ca70aeed9dd/67255207415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b6ef2a3-9286-4ae6-ab89-2abc6a1363d8/nursing_process_book.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_off0000b673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB673 5164 bytes
SHA-256: c421c12d8bdc67b4a6c371c51bd10aebd79169fd6cbdf1eac68ad6d02812e6fa
font_01_sfnt_off0000c80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80D 11312 bytes
SHA-256: 58ee8303f0d3b7dbb97cfa733f8a412258737bf25dc5b99f4458dd3dd7774938

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