Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5c98e8d52ed1a7…

MALICIOUS

PDF

39.3 KB Authoring application: Karbon
MD5: 271c262968f271517f695ee756d028f9 SHA-1: 3a91226f57cbcbf045dbe60e8403ef0325b2384f SHA-256: ba5c98e8d52ed1a747aba63bc97139ed75483982382d9e4830a4f25db601d213
152 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 files hosted on various domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious payloads. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted from this sample, and the document body was heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link distribution.

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://www.evacamarenadesign.com/uploads/1/3/0/5/130550833/gegukoxifez.pdf
    • http://superawesomegadgets.com/uploads/1/3/0/2/130272318/namefigoju.pdf
    • http://mtbstell.com/uploads/1/3/0/5/130590653/2aa27ea6504a156.pdf
    • http://gltransportabaco.com/uploads/1/3/0/4/130435763/bamizafofiz_tilera.pdf
    • http://sfgayscouts.com/uploads/1/3/0/6/130604566/8059788.pdf
    • http://mistersack.net/uploads/1/3/0/4/130476122/dixujetikesukar.pdf
    • http://elsiebubble.com/uploads/1/3/0/7/130775252/6885952.pdf
    • http://msdixonart.com/uploads/1/3/0/5/130589125/xukibutiripi-sogemuzi-zitabesu-gofomi.pdf
    • http://chanah-haddad.com/uploads/1/3/0/5/130588744/xufap.pdf
    • http://zerelina.com/uploads/1/3/0/8/130813663/f22366.pdf
    • http://hostmaster.imagegroup.org.uk/uploads/1/3/0/8/130813756/2386518.pdf
    • http://thegardenstencil.com/uploads/1/3/0/2/130272478/nidejejad_befitilelazuzug_nuximuxiton.pdf
    • http://ofa.sk/uploads/1/3/0/6/130604259/2399284.pdf
    • http://rl3.es/uploads/1/3/0/6/130604528/7006286.pdf
    • http://tiantianboshishicai.br3h.com/uploads/1/3/0/7/130738593/130738593.html#autocad+mechanical+2020+serial+number

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003eac.bin
05f21fea0ff3cba5cf6c36012503bf7ed4872aafb9e855ceba9e992f953b01db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3EAC 8448 bytes

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