Malicious PDF — malware analysis report

Static analysis result for SHA-256 b618e2f72ee2430d…

MALICIOUS

PDF

86.1 KB Created: 2020-11-17 20:23:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2ec3d80d7d86dc3e5eb4f2ecbdf3f7fa SHA-1: 14c82aae9d789a92d383c79f3edcdd17c61cbd3e SHA-256: b618e2f72ee2430daff800b6fb09f73287a266234911b4835e9b4088917bffbf
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-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://trafffe.ru/strik?utm_term=corpse+party+soundtrack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391340/normal_5f93d330aefff.pdfIn PDF document text
    • https://matubupediguja.weebly.com/uploads/1/3/4/1/134131452/dowozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412996/normal_5fb2a5cad4ce7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_5f90f617f3522.pdfIn PDF document text
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/molivewinuniwate.pdfIn PDF document text
    • https://dotodologeviron.weebly.com/uploads/1/3/4/5/134513902/suvidefubupepo_vusirawev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_5f8eff7a3a4ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_5f8d02ded41f0.pdfIn PDF document text
    • https://zinikedefi.weebly.com/uploads/1/3/0/7/130740178/060bbe2c2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f8ac8f96491e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_5f8f98c93e436.pdfIn PDF document text
    • https://ropoxazuwaso.weebly.com/uploads/1/3/4/0/134040565/manisi.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/94cba7eb-3f6c-49a5-b2a5-c1dc02a0cb2e/16393742725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6713f1c2-91cf-4921-9290-ba026f22eaf5/jspdf_autotable_custom_font.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20B 19980 bytes
SHA-256: abac7da17482c76c15d143aa70a8f2e1b82bf6fd22466cc1bd20e988e1e9658e
font_01_sfnt_off00011155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11155 5104 bytes
SHA-256: c012c7c1014ec232d7248af9c40cd7ee369bf9e6f36c13886fd5de0173c89e58
font_02_sfnt_off000122c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C9 12928 bytes
SHA-256: 1f0bb1c9ef03b3df26c9865bf5e45d5b078c114e52f9cc3a532f4ca2d2abd2ec

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