Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58cba2cdf740e09…

MALICIOUS

PDF

73.7 KB Created: 2021-02-17 20:04:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 366a0c93e6a4f8b77afaf658c9a3a37b SHA-1: 1d69611edd35a0e2d0ebbb53f04c3863c080fda3 SHA-256: f58cba2cdf740e093086a43850e17c2b7834db8aaa11951a6bb375586cb886b0
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malicious content delivery mechanism. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attempt to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=commission+worksheet+template PDF link annotation
    • https://cdn.sqhk.co/rimudatige/gghglL1/xuwilifetusenupojusa.pdfIn PDF document text
    • https://nonejekorozu.weebly.com/uploads/1/3/4/1/134108542/dikixuwedimagejazeg.pdfIn PDF document text
    • https://vimitorumu.weebly.com/uploads/1/3/0/8/130814921/fesilofajixawabab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366660/normal_5fe385f6bc54a.pdfIn PDF document text
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/5862058.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/hbhgTWv/19597124950.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/gdQhehf/rigoxatejuwelure.pdfIn PDF document text
    • https://raxorevowipafe.weebly.com/uploads/1/3/4/7/134765671/loxepukevovajuro.pdfIn PDF document text
    • https://cdn.sqhk.co/vugujebeku/hWrgdgj/lords_mobile_online_or_offline.pdfIn PDF document text
    • https://namavikevak.weebly.com/uploads/1/3/2/7/132740743/rezudunofibusu.pdfIn PDF document text
    • http://kirudoxidezogu.22web.org/zurusaxaparij.pdfIn PDF document text
    • https://laxonetamaj.weebly.com/uploads/1/3/4/0/134096763/6671931.pdfIn PDF document text
    • https://xopigitit.weebly.com/uploads/1/3/4/3/134339451/bagufoxi_fuxivo_jigukeri_pemufiwuveju.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/biwubeleba/cid_bangla_mp4.pdfIn PDF document text
    • http://valunat.rf.gd/2057856683.pdfIn PDF document text
    • http://mabazekow.epizy.com/56874862733.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_off0000e543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE543 5120 bytes
SHA-256: 3ee40ba3147b2e3f528082376393ea912fcaae7f3ff4b2fc68d7a9d9077e935f
font_01_sfnt_off0000f690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF690 10308 bytes
SHA-256: dc7c78a538e4f25877acc5587402caa70bf8ef27949d580a9bc9cab0cda0a465

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