Malicious PDF — malware analysis report

Static analysis result for SHA-256 b785668358a84624…

MALICIOUS

PDF

41.2 KB Authoring application: PDFBox
MD5: d6ccfcd401a347330bacf84b35db3e45 SHA-1: 732ed7b2d45ed4e38dd1319adb211939c0ec74e7 SHA-256: b785668358a8462479b0c660d79e17cc6ef397d19f1a04b1aec5ed72fce3f1b4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to other PDF files hosted on suspicious domains. This behavior is indicative of a link farm or redirection scheme designed to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as phishing or a traffic redirection tool.

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://fij.vipiski-besplatno22.icu/uploads/2020/01/28/48d68b6e37a6.pdf
    • http://fid.shopoonline.com/uploads/2020/01/29/ruburakovifuwolur.pdf
    • http://stop-n-smelltheflowers.com/uploads/1/3/0/6/130620746/b1eaab3faf30.pdf
    • http://psykhoshop.com/uploads/1/3/0/4/130483132/torumutufigeri.pdf
    • http://domcent.com/uploads/1/3/0/4/130483346/warizowum.pdf
    • http://fun.splitvolgograd.ru/uploads/2020/01/29/beweso_jewone_gujopuxudivokus.pdf
    • https://mowifiwa.weebly.com/uploads/1/3/0/4/130436085/7a008fd3.pdf
    • http://nizan.weebly.com/uploads/1/3/0/6/130621654/9789099.pdf
    • http://mrlapta.com/uploads/1/3/0/5/130589094/1117a0ba50.pdf
    • https://buvajufa.weebly.com/uploads/1/3/0/3/130379155/6258700.pdf
    • http://nhatrangpartytown.com/uploads/1/3/0/4/130488831/130488831.html#michelin+star+guide+chicago

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000127a.bin
ce150e9505b9109ca8e74bd1872d57447e9215fbde6221df35a214082767e5c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127A 8600 bytes
font_01_sfnt_off00005a6c.bin
c6c28444bcd94379862b6cc7f8cfcdbcdaeb026857ccdb099d87626a561054a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6C 16092 bytes

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