Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be81920eb57e7fd…

MALICIOUS

PDF

42.3 KB Authoring application: PDFBox
MD5: 0771f11914cb6ba3b825c266392034a9 SHA-1: cdf9bce358f39bf6463ff2099e398fd1d46c983a SHA-256: 4be81920eb57e7fd45454b093e315e456b37f8af4764da5fb3e3ba9773e93f81
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm or a phishing campaign designed to redirect users to potentially malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports the phishing classification. No scripts were extracted from this sample.

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://rekwiredcosmeticsllc.com/uploads/1/3/0/6/130604993/9dea0da2dad5ed9.pdf
    • http://mrreynoldsmathclass.com/uploads/1/3/0/3/130379611/11ecc0afb.pdf
    • http://sproutlanguage.com/uploads/1/3/0/2/130287988/ec5a8060fa02.pdf
    • http://sodizin.net/uploads/1/3/0/6/130639467/mekizetegi.pdf
    • http://guitarhugs.com/uploads/1/3/0/4/130476700/wimixol-majilit.pdf
    • http://mixuxe.eisk-ads.com/uploads/2020/01/29/4daf79a3baa7e.pdf
    • http://marlinjames.net/uploads/1/3/0/7/130776592/4946191.pdf
    • http://kuniusedcars.com/uploads/1/3/0/2/130288567/daveviwefuvedem.pdf
    • http://dragonwearables.com/uploads/1/3/0/4/130476589/7854318.pdf
    • http://lat.evanstonfcu.com/uploads/2020/01/28/1820410.pdf
    • http://theselvakids.com/uploads/1/3/0/3/130379193/jiwosa.pdf
    • http://djsacademy.com/uploads/1/3/0/4/130476310/130476310.html#biblia+reina+valera+cristiana+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001292.bin
8f7c8a741da3b11e54b56e395e6a33f9662360c5a6790caf0b47f8701ae2a5e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1292 9292 bytes
font_01_sfnt_off00005d9a.bin
d2be4324ea85f46c9bb4ffd26358c7cfd1611c1246fc57774eae11ca9f8f8764		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9A 16316 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.