Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d0e427017fa41a…

MALICIOUS

PDF

62.7 KB Created: 2021-01-09 18:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2daa03c323ac5fcab3e046432be0e111 SHA-1: 1012f5d58e686f4cd1062c10ff70b994efdedcf4 SHA-256: e6d0e427017fa41afc5be63a8325f0fdd83048cdd7de33dcff0d81f47132776e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO abuse. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=dividing+rational+expressions+worksheet+pdf PDF link annotation
    • https://cdn.sqhk.co/tutogalubete/IxgcuB4/bass_editor_boost_bass_and_save_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414353/normal_5faf0944d2f1b.pdfIn PDF document text
    • https://ropesafubisok.weebly.com/uploads/1/3/4/5/134515157/vejag-zudopedarabap-nadak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382771/normal_5fde9e4b324fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446494/normal_5fc3ca3288475.pdfIn PDF document text
    • https://xalemutaxites.weebly.com/uploads/1/3/0/9/130969461/2236d6f1.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/sajatesawodiji/6083140760.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/xevorixuziwi.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/najaxidivajonapala.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/lemenudevuwosopu.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/30303908779.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/anime_heaven_us.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/praise_the_lord_meme.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_off0000b9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C8 5584 bytes
SHA-256: f7708f13594768adcfa74c9e52c7ec751b790d070cfa826158f3571daffeae63
font_01_sfnt_off0000ccec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEC 9728 bytes
SHA-256: cfa18aa7afe9ca8d46b8486546c67e622de8ebfe2c2a705dd6451d81b8351df8

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