Malicious PDF — malware analysis report

Static analysis result for SHA-256 00990e78a6f96a89…

MALICIOUS

PDF

68.8 KB Created: 2020-11-20 08:17:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c9368a77927050471193f66c9230d7d0 SHA-1: 9d228e65cb83ba903168507ff44cb1dd9c360ee9 SHA-256: 00990e78a6f96a891306f2e87e03c3c76b75721c3d131865b88d6e55099f1a61
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, characteristic of a link farm or phishing lure, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive external URLs point towards an attempt to redirect users to malicious content, potentially leveraging embedded JavaScript for obfuscation or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://traffine.ru/123?utm_term=rotc+study+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467003/normal_5fb33508e0dfe.pdfIn PDF document text
    • https://gegovufefole.weebly.com/uploads/1/3/4/5/134520867/9145178.pdfIn PDF document text
    • https://zekasujiminog.weebly.com/uploads/1/3/4/3/134366003/fajigasiw-nejerosevajakon-komafijavakumo-xozal.pdfIn PDF document text
    • https://gepinizidewepi.weebly.com/uploads/1/3/4/3/134305752/retebolixorega.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/26082b208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417118/normal_5fb2e277af207.pdfIn PDF document text
    • https://poxesogu.weebly.com/uploads/1/3/4/8/134854809/60d5162a344918.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/kabisebax/minecraft_lucky_block_servers.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/lutaxifaber.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_off0000d19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19D 4876 bytes
SHA-256: cdefb1fd38df40c49636a1f472385daa29489f50783349d5e12935c1826649b3
font_01_sfnt_off0000e25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25F 10708 bytes
SHA-256: 4ddcc4da7b7a549c84a9831eb494e84b8a8b4d81924ff99918cf300846a56ef2