Malicious PDF — malware analysis report

Static analysis result for SHA-256 4feeeaa99de3cbab…

MALICIOUS

PDF

70.5 KB Created: 2020-12-13 14:05:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c370b61023ed2064d1f43e65e14aff46 SHA-1: d77bca0edba2a9df2366a99499d453cd3cd1cd96 SHA-256: 4feeeaa99de3cbabb326562dd4081b010c8b8568a9e7931c3055be62379884f3
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://traffine.ru/aws?utm_term=mitos+sobre+el+alcoholismo+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410731/normal_5f9e7a9b0704a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392207/normal_5fb8426f24abd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fcb657f701da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414334/normal_5f9fc6762b797.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420468/normal_5fc83ef8848d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426558/normal_5f99efd5a7d8c.pdfIn PDF document text
    • https://katidifivova.weebly.com/uploads/1/3/4/7/134715674/xajagabudaxugonigod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425511/normal_5fc549b809808.pdfIn PDF document text
    • https://vavetoros.weebly.com/uploads/1/3/4/8/134854671/kejarafirato.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/bb811722-315e-47d0-8e04-d9c58cc564ce/franciscan_desert_rose_price_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d785085bf90c0efcc6ad/t/5fc0f1d59d79364840af6649/1606480342090/pirates_treasure_runescape_quick_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1202595-68ea-420c-93cb-b4f816437cf9/zezagabuwajegi.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_off0000d57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57D 5540 bytes
SHA-256: 592d7598d842a6af5df881358157762706ca1ac31d0fe8060532b92f7244c32a
font_01_sfnt_off0000e82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82A 10956 bytes
SHA-256: 6bcc333663e676e223e6fa255943cfd6c8b6dd1c733947bcb0092ad4940d72dc

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