Malicious PDF — malware analysis report

Static analysis result for SHA-256 2083733945ac8543…

MALICIOUS

PDF

34.9 KB Authoring application: PDF Studio
MD5: f6a2f48d447d622bd889b81f27a97a00 SHA-1: 4c3ee6be97f1a62266d0641b812fb97f8a0d8253 SHA-256: 2083733945ac8543a4261ddfa8962d363327e3615940d7e452784dc60c64d23c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as http://suk.paulandkelsey.com/uploads/2020/01/28/4266343.pdf, are likely part of this redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://suk.paulandkelsey.com/uploads/2020/01/28/4266343.pdf
    • http://bodydelux.com/uploads/1/3/0/4/130483900/lasoxenezevavoxu.pdf
    • https://najinapajug.weebly.com/uploads/1/3/0/2/130291694/8140864.pdf
    • http://simplybakon.com/uploads/1/3/0/5/130550683/rutut.pdf
    • https://sekubuliluvefaf.weebly.com/uploads/1/3/0/3/130379147/4596514.pdf
    • https://kukefokojuf.weebly.com/uploads/1/3/0/5/130590475/xizijimetoz.pdf
    • http://music4am.com/uploads/1/3/0/6/130605190/3408058.pdf
    • http://arshin.online/uploads/2020/01/27/b8df53.pdf
    • https://rijuxonad.weebly.com/uploads/1/3/0/2/130289379/tofutanefeti.pdf
    • http://goni.web-delo.icu/uploads/2020/01/28/7040251.pdf
    • https://mamelijedudi.weebly.com/uploads/1/3/0/3/130324136/2449336.pdf
    • https://zulefejojobef.weebly.com/uploads/1/3/0/6/130604575/3373006.pdf
    • https://tuvosoxofiwixu.weebly.com/uploads/1/3/0/5/130550675/gojaxiruzitus-sigokipiwerare-kisezerobef.pdf
    • http://suzole.tierheilbehandlung.com/uploads/2020/01/27/nezamuxad_tewobebipolu_fiwafaz_rokudag.pdf
    • http://knockout-pictures.com/uploads/1/3/0/5/130544468/525ecd63b3a.pdf
    • http://segisabu.ultraviviente.org/uploads/2020/01/29/9903357.pdf
    • http://fineconsignhickory.net/uploads/1/3/0/3/130313324/xomimumomuvi_pawixinelosiz_wabevazodow_vuzumeb.pdf
    • http://waso.amazon-sellers-check.com/uploads/2020/01/28/9318024.pdf
    • http://uncommoncore.weebly.com/uploads/1/3/0/5/130543148/kaluxegug.pdf
    • http://statelab.weebly.com/uploads/1/3/0/6/130604333/kogefupum_jolaxor.pdf
    • http://mindforyou.org/uploads/1/3/0/6/130639810/130639810.html#bela+bartok+viola+concerto+sheet+music
    • http://suzole.tierheilbehandlung.com/uploads/2020/01/27/nezamuxad

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000160b.bin
8edaf346a03005c4ac0e9525b56c715a46ca7ea67508641081756402530c027b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160B 8720 bytes

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