Malicious PDF — malware analysis report

Static analysis result for SHA-256 25008e76d050bf48…

MALICIOUS

PDF

73.7 KB Created: 2021-03-20 23:32:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b509da9fc55604682b1e127f2056aa3e SHA-1: 2c87bd5f347d0fa17dde9ddd09e28da536203650 SHA-256: 25008e76d050bf485bc86f2c706b9c8e1fda75428b215ca4b1f85c2af60a544d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains commonly used for phishing and malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or credential harvesting. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/aws?utm_term=kriya+yoga+for+beginners+pdf
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/nenotidu-gusavelob-tuxozafifat.pdf
    • https://cdn.sqhk.co/xonizarisu/bgrYhhi/44857311876.pdf
    • https://gekirexuwiri.weebly.com/uploads/1/3/1/4/131452917/6056559.pdf
    • https://dafepigog.weebly.com/uploads/1/3/4/6/134605944/vixex.pdf
    • https://funoridarudaru.weebly.com/uploads/1/3/5/3/135304061/ffeb1175d0.pdf
    • https://mifurujuxix.weebly.com/uploads/1/3/3/9/133997148/gigofo.pdf
    • https://cdn.sqhk.co/gujowaxexag/vThbhgL/99409153585.pdf
    • https://tiwixuferexo.weebly.com/uploads/1/3/1/3/131380596/4701144.pdf
    • https://cdn.sqhk.co/lokiwejawe/jeggKJr/80719926469.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jesotumab.rf.gd/961002516.pdf
    • https://s3.amazonaws.com/tumasun/34406985941.pdf
    • https://s3.amazonaws.com/liluvad/98823894085.pdf
    • http://tunogamux.rf.gd/tofusexenagu.pdf
    • https://s3.amazonaws.com/vososasoxumete/75694452438.pdf
    • http://bepapogijarepub.rf.gd/retebu.pdf
    • http://karudopinu.rf.gd/how_many_rare_genetic_disorders_are_there.pdf
    • https://s3.amazonaws.com/mamibis/gesefokekefopuwo.pdf
    • https://s3.amazonaws.com/muvevanepen/97775292434.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e360.bin
65e46ebb90fcf1bb670dee328d0f7db34e0e496e06a849c7dae94764fa9f62df
pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 5388 bytes
font_01_sfnt_off0000f5d0.bin
fd6782dc911fc010c235a7eb26e9a1aba17f552523d12291649ea0bfdc3c4da8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D0 10648 bytes