Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64a3f9599d0487b…

MALICIOUS

PDF

77.4 KB Created: 2021-05-28 11:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5a211e6af19a1628f745c6f93b706213 SHA-1: 232acdf7166340f5e1afd71af1397d73b3718523 SHA-256: f64a3f9599d0487b8e9436908d25b717a9034f8baf68f31217af8b4c38380c52
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large farm of external links, many hosted on disposable domains, suggesting a distribution or redirection mechanism. The document's content, though heavily obfuscated, appears to be a lure related to 'Richard clayderman sheet music book pdf', aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://botokaw.ru/strik?utm_term=richard+clayderman+sheet+music+book+pdf PDF link annotation
    • https://bivofeneduwid.weebly.com/uploads/1/3/1/1/131163561/gibulatitajine.pdfIn PDF document text
    • https://tapabuwenoripop.weebly.com/uploads/1/3/4/9/134904450/xozubute.pdfIn PDF document text
    • https://zajoxewamabovi.weebly.com/uploads/1/3/7/5/137503144/d868c603d6c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476939/normal_6056f8c9d9398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454556/normal_60338f0546269.pdfIn PDF document text
    • https://vivimojegoduv.weebly.com/uploads/1/3/4/8/134890214/watelofab.pdfIn PDF document text
    • https://vagaletufuwowi.weebly.com/uploads/1/3/2/6/132681464/4641797c2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_600e3d883e135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426550/normal_6041a94cb4bf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417025/normal_6048e6c4b662f.pdfIn PDF document text
    • https://kilekefaze.weebly.com/uploads/1/3/4/6/134631798/7612601.pdfIn PDF document text
    • https://mamowoxu.weebly.com/uploads/1/3/4/2/134265364/vumadovimazulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451941/normal_606aa4199a728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454422/normal_601664a5f0476.pdfIn PDF document text
    • https://rororejiwep.weebly.com/uploads/1/3/5/9/135966539/4269635.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481072/normal_5ff3a337ec21e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450043/normal_601023bb0bc4e.pdfIn PDF document text
    • https://kifikutomile.weebly.com/uploads/1/3/0/7/130776046/1239035.pdfIn PDF document text
    • https://gitesadikelipa.weebly.com/uploads/1/3/0/7/130776331/pubunelawukofi-galesoxebikeme-mupisesomile-senen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390641/normal_60373b702692b.pdfIn PDF document text
    • https://xumolatakikekum.weebly.com/uploads/1/3/4/3/134335049/1123533.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_off0000f0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B0 5708 bytes
SHA-256: 75a6c1056dcdb09eb908759f14a4747bfd3118b7768637ef20f19bc206bfd94f
font_01_sfnt_off000103f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F9 10640 bytes
SHA-256: c49d985932753f55d2fce207ecd7ee62a7ab7dac84751ccfbbedad7293becd74