Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2f350b41950417…

MALICIOUS

PDF

42.9 KB Authoring application: Poppler-utils
MD5: e288984094a8c834e1460b55aec7aadd SHA-1: 38d12faf9084728c84eeddd9f3b115cf44ca4573 SHA-256: fb2f350b4195041760772a26b7dc3adc7445a26b1ef786ad0f5a092576f51e00
152 Risk Score

Malware Insights

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

The PDF_SEO_LINK_FARM heuristic indicates the document contains a large number of external links, a common tactic for phishing or distributing further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URLs point to other PDF files, suggesting a chain of redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://lachozaspa.com/uploads/1/3/0/5/130542718/vutonemovunizino.pdf
    • http://keystonewildcatssoftball.com/uploads/1/3/0/4/130490665/9364f.pdf
    • http://obxelectrical.com/uploads/1/3/0/5/130539479/9270607.pdf
    • http://marinasegatti.com/uploads/1/3/0/4/130479082/tisepiluvexane.pdf
    • http://kivon.kinotani.icu/uploads/2020/01/28/lunisipumab-vodizavifunovaw.pdf
    • http://mrworkman.ca/uploads/1/3/0/3/130313504/b12bc2.pdf
    • http://newperspectivemedical.com/uploads/1/3/0/3/130313057/130313057.html#neuralgia+pos+herpetica+tratamento+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001185.bin
af5548422d8582e747fed05c72309eab18b90293bef43624bbff6e6ac4f5a67c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1185 11308 bytes

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