Malicious PDF — malware analysis report

Static analysis result for SHA-256 b86ba1c1d673ca4b…

MALICIOUS

PDF

36.3 KB Authoring application: QPDF
MD5: eedabb2e937e943ed7829bb09197f840 SHA-1: 0ca7b6d52f22bf3c1fc19be297e36dc9adbd8fb6 SHA-256: b86ba1c1d673ca4b523b9277998f5fd40672c26e63934dd08b401a7710a187d7
150 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files, a technique often used for SEO spam 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, though obfuscated, contains references to a 'Promissory note template new york' and includes numerous URLs, reinforcing the phishing or scam lure.

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://thelazyrussian.com/uploads/1/3/0/6/130604642/bomemaledor.pdf
    • http://northwestembroidery.net/uploads/1/3/0/2/130289229/6871540.pdf
    • https://wijobitirinivo.weebly.com/uploads/1/3/0/5/130590763/nulexe.pdf
    • http://stbfaithformation.com/uploads/1/3/0/6/130620391/b58ed23e0e.pdf
    • http://tauroafarmandwildexperience.com/uploads/1/3/0/2/130272355/kodavove.pdf
    • http://poolpatioscreenrepairorlando.com/uploads/1/3/0/6/130621916/4798396.pdf
    • http://dozobumef.ibuyersclub.com/uploads/2020/01/28/bimesomiga-razoridalunidaz-bejizolifar.pdf
    • http://mmpe.cn/uploads/1/3/0/4/130483477/ad94304a.pdf
    • http://gwe-design.com/uploads/1/3/0/6/130605017/gofesunabafumux-libivedezuweg.pdf
    • http://therealmommy.com/uploads/1/3/0/3/130323335/tosetag.pdf
    • http://colddiamnd.com/uploads/1/3/0/7/130739124/130739124.html#promissory+note+template+new+york

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000141f.bin
cb2120f46e0738583158a05a0557418bfa9c77c431ee0e761c8af5b7d9fbe66c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141F 8396 bytes

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