Malicious PDF — malware analysis report

Static analysis result for SHA-256 167b44b89cb50255…

MALICIOUS

PDF

37.9 KB Authoring application: PDFBox
MD5: 82b50632a0978e9031418e3a86611f76 SHA-1: f4f25672a6ad2bbe80aa63fed2d3adcfd93a30c7 SHA-256: 167b44b89cb50255f91b39cd7a981ac5d18ecb09da85436b3d99193a879e4cc7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, forming a link farm, which is a common tactic for phishing or distributing malware. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

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://jesscofield.com/uploads/1/3/0/4/130478205/8020304.pdf
    • http://bungyscuba.com/uploads/1/3/0/6/130620729/numurav_jazamezolarepu_xasakuga_padugujobuxad.pdf
    • http://lowanesi.combatsambo.moscow/uploads/2020/01/27/kipow.pdf
    • http://propertytaxguy.biz/uploads/1/3/0/5/130539155/marezomosapadez.pdf
    • http://topewobe.satellit55.ru/uploads/2020/01/27/5e04a2.pdf
    • http://barbaravalusek.com/uploads/1/3/0/6/130620382/tosim-gikojumeda.pdf
    • http://worksafehsesolutions.com/uploads/1/3/0/2/130270832/komoguf.pdf
    • http://gadik.startdogs.com/uploads/2020/01/28/pefaputuvajekovu.pdf
    • http://jiduvax.tehnobay.com/uploads/2020/01/27/61552963dc6645.pdf
    • http://mrkdenton.com/uploads/1/3/0/3/130324167/8804047.pdf
    • http://nezob.pokupka-super10.ru/uploads/2020/01/27/f43fd56ca0f.pdf
    • https://joginezugetugu.weebly.com/uploads/1/3/0/5/130588304/2a53a38.pdf
    • http://cresswellpaints.com/uploads/1/3/0/2/130288729/lexefivuzaxavu-zeruw.pdf
    • http://urbanpho.com/uploads/1/3/0/6/130605435/donus.pdf
    • http://logisticsbeacon.com/uploads/1/3/0/2/130272387/dulufida_tijivepolob_tugetokamolati.pdf
    • http://mikewilliamslivemusic.com/uploads/1/3/0/5/130540406/fa494843.pdf
    • http://lilacsjoyandgrace.com/uploads/1/3/0/3/130323622/395846.pdf
    • http://nauticflclub.org/uploads/2020/01/28/nekun.pdf
    • http://clean-housecleaning.com/uploads/1/3/0/5/130550777/4a11f92.pdf
    • https://ruzebemomubil.weebly.com/uploads/1/3/0/4/130488252/cf2542658a9df18.pdf
    • http://pameladirnberger.com/uploads/1/3/0/3/130313035/130313035.html#grade+11+english+textbook+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000016fa.bin
65562a1cac685b59d4e288ad1f3fbbd4cf539a24beed7a72fbb1eae0966dae94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16FA 7220 bytes

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