Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a04107fe06b65aa…

MALICIOUS

PDF

40.1 KB Authoring application: PDFedit
MD5: 25562be2c89b5137365ca3650f167da2 SHA-1: 2ffd47a68982746063680840e7d194b182f72885 SHA-256: 5a04107fe06b65aad061004662521c4bcbdd4255ec0237f1c38608d0c95835ec
152 Risk Score

Malware Insights

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

The PDF contains a link farm with multiple embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. The document body text, though partially corrupted, suggests a lure related to 'A wrinkle in time summary chapter 4'. The primary intent appears to be directing users to a network of malicious PDF files hosted on various domains, likely for phishing or malware distribution. The ClamAV detection and ML classifier further confirm its malicious nature.

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://parkland.school.nz/uploads/1/3/0/6/130604682/6148275.pdf
    • http://seasonalswap.com/uploads/1/3/0/5/130588816/7839136.pdf
    • http://blondiau.org/uploads/1/3/0/5/130551364/8374786.pdf
    • http://zoga.chama.site/uploads/2020/01/28/likugudusebowebofina.pdf
    • http://applepickndays.com/uploads/1/3/0/3/130324030/budekanatomotip-ditereme-movifepukurariv.pdf
    • http://mxsnot.com/uploads/1/3/0/2/130273735/48fe89594b1a229.pdf
    • http://skipcoryell.com/uploads/1/3/0/3/130313766/8412490.pdf
    • http://e2bioconsults.com/uploads/1/3/0/6/130604771/5623416.pdf
    • http://newflavorhouseinc.com/uploads/1/3/0/6/130605389/65bef0db7aeccad.pdf
    • http://foothillsbiblefellowship.com/uploads/1/3/0/2/130289550/130289550.html#a+wrinkle+in+time+summary+chapter+4

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000119e.bin
46a787957db0926f36843eb9d12269add6987e173b5b4959796645d0714676c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119E 7240 bytes

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