Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfaba02b741e4dfe…

MALICIOUS

PDF

34.5 KB Authoring application: Smallpdf Desktop
MD5: 0cd839fcd4a927bade780d675a72786b SHA-1: 00da2b6ab3695a03770a41378407fb4cd623e91d SHA-256: bfaba02b741e4dfe0b320efa095d0aa2fb38a5b4b46f7637a81d11e9ed89f504
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The critical PDF_SEO_LINK_FARM heuristic indicates the presence of a large number of external links, with the primary observed domain being dangerzoneuboldo.com. These links are likely intended to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dangerzoneuboldo.com/uploads/1/3/0/5/130551491/mopuraninepodij-xuxujin-suwilevanunabi.pdf
    • http://neo-water.net/uploads/1/3/0/5/130589423/7a20af6.pdf
    • http://dimensionalfinancialservices.com/uploads/1/3/0/5/130589031/2906919.pdf
    • http://moderntutoringandeducationservices.com/uploads/1/3/0/2/130288684/6018299.pdf
    • http://davidmarquesibanez.com/uploads/1/3/0/5/130589399/130589399.html#present+perfect+or+past+simple+exercise+english+grammar+spot

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000125b.bin
5db68ac84a580c0b4ea6a442b3a4fee6f03bd69234fd36e4b13672ad204d281e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125B 7548 bytes

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