Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b64486580fe931…

MALICIOUS

PDF

44.4 KB Authoring application: LibreOffice Draw
MD5: 2ac3c2d574312133a727146c6558f879 SHA-1: 99913b2500bdf4e12651f445b31369ffa3344ecb SHA-256: d9b64486580fe9310da407adf96c1b98dc66939c72e0bbafc3f95915221347ba
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body itself is largely unreadable but contains references to these URLs, reinforcing the attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jop.voloklinik.com/uploads/2020/01/29/7177780.pdf
    • http://bizafur.martinsembalagensam.com/uploads/2020/01/28/8134931.pdf
    • http://wovubeb.regpanel.club/uploads/2020/01/27/jobadelalof-gifezo.pdf
    • http://xapuxelin.beru-credit.ru/uploads/2020/01/28/foferulobawiku.pdf
    • http://love-your-mind.com/uploads/1/3/0/3/130379757/989128.pdf
    • https://jefunevun.weebly.com/uploads/1/3/0/4/130488513/9822362.pdf
    • http://xitejuwi.remont-turbin-orenburg.ru/uploads/2020/01/27/5732aa5391.pdf
    • http://staterealty.ru/uploads/2020/01/28/vetugaf.pdf
    • http://stopgemorroj.ru/uploads/2020/01/28/gipudukevanuzo_sogikavebafeje.pdf
    • http://kparksandrec.com/uploads/1/3/0/6/130604168/vokalurakevarisuruk.pdf
    • http://photosbyjamal.com/uploads/1/3/0/5/130541211/6025803.pdf
    • http://lixebum.jitoli.icu/uploads/2020/01/28/6913585.pdf
    • http://lifeindustries.org/uploads/1/3/0/5/130588720/jovaxepata.pdf
    • http://fotodom-rzn.ru/uploads/2020/01/28/435dd2671f10f.pdf
    • https://gorobudokakolef.weebly.com/uploads/1/3/0/5/130539078/sojozunuvefe-lizanoge-dapezij.pdf
    • http://patujepofa.rektes.tech/uploads/2020/01/28/9842340.pdf
    • http://honorguardprotectiveservices.com/uploads/1/3/0/4/130476619/804304560fb.pdf
    • https://subazekuru.weebly.com/uploads/1/3/0/4/130476148/megiwafukajefozizajo.pdf
    • http://18thcenturycraft.com/uploads/1/3/0/2/130289542/5380460.pdf
    • http://cctfi.biz/uploads/2020/01/27/3792650.pdf
    • https://filinedimumedam.weebly.com/uploads/1/3/0/5/130539316/duvas.pdf
    • http://lampalounge.ru/uploads/2020/01/28/cb3bd879a66548.pdf
    • http://icpro.website/uploads/1/3/0/6/130604288/bizuritu.pdf
    • http://jefowi.paperpsych.com/uploads/2020/01/27/40bc72d.pdf
    • http://marekimav.ekkohouse.ru/uploads/2020/01/27/4076601.pdf
    • http://annotalegal.com/uploads/1/3/0/6/130620510/130620510.html#ballot+paper+template+excel

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000171e.bin
8bb47ead88cf1d1a2d19a0c1406a03606b16f2fc408cc7a275ab067e677d6be5
pdf-font-stream PDF embedded font (sfnt) at offset 0x171E 7852 bytes
font_01_sfnt_off00006607.bin
babe403de6de54d55b400948696eda07788430e2b852cfd621b353dea7ef1e45
pdf-font-stream PDF embedded font (sfnt) at offset 0x6607 16060 bytes