Malicious PDF — malware analysis report

Static analysis result for SHA-256 71cc97faebc0a471…

MALICIOUS

PDF

38.1 KB Authoring application: OpenOffice.org
MD5: 5c6b757a6742a94f64f47e54e300b69a SHA-1: e257ec4c2446435f8d2324f19fc392455ba0acdf SHA-256: 71cc97faebc0a47113f30f96a951a4bc3ecac3a7e40b8fd28b863211b4b915ab
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, many of which are structured as numeric slugs, indicative of a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as phishing. The embedded links likely lead to further malicious documents or exploits.

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://littlefishpress.com/uploads/1/3/0/6/130621141/futiwuner_rajojenojon_zopogapedefuzu_diliwakobogon.pdf
    • http://lopila.audiostart18.icu/uploads/2020/01/28/guwurasapi.pdf
    • https://zafuroma.weebly.com/uploads/1/3/0/5/130588581/9669294.pdf
    • http://buga.iizznqll.info/uploads/2020/01/29/6a874.pdf
    • http://noveljourneyer.life/uploads/1/3/0/6/130604127/5723952.pdf
    • http://puwaf.xelamit.ru/uploads/2020/01/28/valofisasu.pdf
    • http://did.galaxytools.ru/uploads/2020/01/27/c2f6c36e708.pdf
    • http://pebubu.ferbetsy.ru/uploads/2020/01/27/20ef8.pdf
    • https://dojiwolefubipa.weebly.com/uploads/1/3/0/4/130483673/9213014.pdf
    • http://texo.postroisvoydom.ru/uploads/2020/01/29/6d925e09.pdf
    • http://bestrobloxhack.fun/uploads/2020/01/29/bidemo.pdf
    • http://economicstitan.com/uploads/1/3/0/3/130313766/dojevanevup.pdf
    • http://lachlanswan.com/uploads/1/3/0/6/130620544/bamilimogedam.pdf
    • http://smaakfestijn.nl/uploads/1/3/0/4/130489350/ef1924af.pdf
    • https://luludodewo.weebly.com/uploads/1/3/0/5/130540063/peroveverifit.pdf
    • http://mychinesewatch.com/uploads/1/3/0/6/130620293/130620293.html#apa+style+manual+5th+edition

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000142f.bin
1542081a8d1a8de65e4b0009aa8e3bd9f6cdace4d298cf6b4db4175203d15227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142F 8744 bytes

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