Malicious PDF — malware analysis report

Static analysis result for SHA-256 24624b8fe6dfeef8…

MALICIOUS

PDF

77.9 KB Created: 2021-02-25 07:10:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 782e2f7aa84d38fa5ad1b819fec69424 SHA-1: b0fef9535870ac3a5a3bad3ca07b24a2b5e86390 SHA-256: 24624b8fe6dfeef8096ac0cacdadd2031990b869f426344d4d53f4fcbbaf3325
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs and the PDF structure suggest an attempt to redirect users to potentially harmful websites, likely for phishing or malware delivery. No scripts were extracted, but the presence of numerous external URIs points to a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/wix?keyword=16.2+ideas+that+shaped+darwin%2527s+thinking+answers PDF link annotation
    • http://kosamaritaj.getenjoyment.net/74084884894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387054/normal_601e6ce0130e6.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/Vgh7Ag3/belubowefebaro.pdfIn PDF document text
    • https://cdn.sqhk.co/wiluxuko/4ijjget/91548900607.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/96158113867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372682/normal_600bc6cbdd77c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_6011ea20d939a.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/95728764926.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403685/normal_5feef0f5c3781.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/fTPjj0y/nalabowotugesebe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://daxararudivoxik.rf.gd/24931833267.pdfIn PDF document text
    • http://badisaxutut.rf.gd/auto_repair_receipt_template.pdfIn PDF document text
    • http://jawikaginixuxuz.rf.gd/sexovekerexoxe.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_off0000f46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46C 5652 bytes
SHA-256: e21076cfc6f5bfa36113207c28c522a0b026b29fbde994295a1fc28347893569
font_01_sfnt_off000107ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CE 10208 bytes
SHA-256: ed7467ecc8175d3b285ca686e24f7444c94d1264b308e76d4ea84133d51d62ea

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