Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2d3d0cadb84a4e…

MALICIOUS

PDF

75.8 KB Created: 2020-11-13 13:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2d39b64954805e9812dec034f71ab932 SHA-1: dde1c456656f0fe7624421305abfbfde8e390f56 SHA-256: ab2d3d0cadb84a4e9ba9b4cc54fe02a82b40b6c9952ea2fea103eec694899f14
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://trafffi.ru/123?utm_term=clash+of+magic+mod+apk+download+for+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407756/normal_5f9850aba7a86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_5f90104420763.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5fa4b174742ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390382/normal_5f907b7002bf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482002/normal_5fa9acebe3313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f9619949e26a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_5fa56452bf9b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5f9c1536029e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380871/normal_5f8bee8d835ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376125/normal_5fa87947cfad0.pdfIn PDF document text
    • https://vigasobokaj.weebly.com/uploads/1/3/4/6/134619364/koxiwejazazajegokubu.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/kisimujuk/wetuwezodipa.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_off0000ea22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA22 5632 bytes
SHA-256: 1f74f4d62c9bf9bcfa727a4b627eb64ac14c5538d5c9cdd5df6f5f93dd9abc03
font_01_sfnt_off0000fd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD30 10848 bytes
SHA-256: 396ef98d4758a6f3300174612a6e8c342cc0db98f1a126ac7873a8075be8fca4

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