Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be87475f4a2bd52…

MALICIOUS

PDF

71.9 KB Created: 2021-06-04 21:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d1ae1bd1a11d3b33dcd969cf6c6c74af SHA-1: 92bc550d1010e6dc305f3aa61248a7098ffe6a70 SHA-256: 5be87475f4a2bd524c2b2fb5b1abc0e4912f902b3b393c7497df0fe64a0370e1
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 0.9998

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://allytemp.ru/pbw?utm_term=crash+course+us+history+worksheets+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377112/normal_606965bbd6886.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4480414/normal_60b1d0acc4d3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_604cc1b30df0d.pdfIn PDF document text
    • https://zazetafulunemu.weebly.com/uploads/1/3/4/5/134599809/zivubepero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_606a35dae8688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414864/normal_606e6e079f156.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452161/normal_604625945f6fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461204/normal_5ff8b539e2396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409107/normal_603c5960396e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496015/normal_600ebcf90c4ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_603d74ad46984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415937/normal_6056af3cacf8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480598/normal_606bf4df9bde2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387698/normal_6012f414309a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414687/normal_5fca64393b2ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385631/normal_5fcea9171d934.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462065/normal_5ff3b3f71e6ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_5fd0b8575d3de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5fc85245d9329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418001/normal_6022db4fe397c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD929 5376 bytes
SHA-256: 2ca04739da94cf4a955bcdde7fd11b2249dc49ab72d3a808c098bca464ce448c
font_01_sfnt_off0000eb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB82 11344 bytes
SHA-256: 9ec380fc969ec3118f1c9527460e9ea6084fe4d9908c44c7af365c6f8fd65788

Open this report in the interactive analyzer, or submit your own file for analysis.