Malicious PDF — malware analysis report

Static analysis result for SHA-256 c897806605cc0dd2…

MALICIOUS

PDF

56.9 KB Authoring application: pdf-parser
MD5: c86d2fb8bcc1d3ce0c0e03cd9df88b0a SHA-1: 48bdc92432e12f76af289346ef686a96a5b9d651 SHA-256: c897806605cc0dd2849caf9fd0231f03f1dde9f2c690d3ad8b1dfacc614a8204
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body itself is heavily obfuscated and contains references to Fallout 76, likely a lure to disguise the malicious links. The primary attack pattern involves redirecting users to a link farm of potentially malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://tapisizinag.weebly.com/uploads/1/3/0/2/130289610/wosanetebik.pdf
    • http://datfuck.com/uploads/2020/01/28/wapij.pdf
    • http://tehnika-asko.ru/uploads/2020/01/27/kulejopageno_wobijonanamikoj.pdf
    • https://zesiziwesaberut.weebly.com/uploads/1/3/0/2/130287989/lemoz-juvupirixusij-lanutidewuromer-bajitiwijeze.pdf
    • http://tutsovet.ru/uploads/2020/01/27/2701581.pdf
    • http://weg.rugbyspb.ru/uploads/2020/01/27/podow-dewavojanuri-gogipinexom-zasudumevoz.pdf
    • http://gera.rbc-crypto.ru/uploads/2020/01/28/1318295.pdf
    • http://seguro-property-management.com/uploads/1/3/0/5/130589083/totewavuvezexav.pdf
    • http://vomi.fmmoduliator.store/uploads/2020/01/29/8502313.pdf
    • https://wigepeponaku.weebly.com/uploads/1/3/0/2/130270768/guteneb.pdf
    • https://dojiwolefubipa.weebly.com/uploads/1/3/0/4/130483673/01a3e857.pdf
    • http://wopati.zahopl.xyz/uploads/2020/01/28/49518a8ffe06.pdf
    • http://zuxoweti.indieban.com/uploads/2020/01/27/3259759.pdf
    • http://mugedatid.yeguadadosvaqueros.com/uploads/2020/01/27/129136ca16.pdf
    • http://dinifu.partizansk-vc.ru/uploads/2020/01/27/remimirexanaw.pdf
    • http://weniriti.offparst.com/uploads/2020/01/28/3585668.pdf
    • http://aliveyouthmebc.com/uploads/1/3/0/4/130491079/6288454.pdf
    • https://gakigagi.weebly.com/uploads/1/3/0/4/130476684/sanofibate.pdf
    • http://smm-pr.com/uploads/2020/01/27/lajag_lugiz.pdf
    • https://marozofodib.weebly.com/uploads/1/3/0/5/130551155/seresebimigo.pdf
    • https://zubugovafolif.weebly.com/uploads/1/3/0/6/130605219/0109d9de6d.pdf
    • http://tisafo.bayua.xyz/uploads/2020/01/27/f2d90c7ab4ca65.pdf
    • http://nzwildlifeartist.com/uploads/1/3/0/4/130476502/xubigolesidujasexigu.pdf
    • http://jewam.anonima-net.fun/uploads/2020/01/29/9861095.pdf
    • http://cyclebavaria.com/uploads/1/3/0/4/130478307/130478307.html#fallout+76+urban+scout+armor

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000136d.bin
0a7cfc9ae060ce71af108ad25c0aebe5ff8f3f15d5fd07940ebb4f52b43be4ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136D 7844 bytes

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