Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bcb99076fe4294…

MALICIOUS

PDF

33.6 KB Authoring application: Karbon
MD5: dd08cac33c9d50b0cd59bee092a7635e SHA-1: 98fafdb795375b025629ba8f89a0da42927038eb SHA-256: d0bcb99076fe4294c364dca81a12f7980f1df78feb0d7d95691c09538ee4961c
150 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and exhibits a critical heuristic for a PDF SEO link farm. The document body contains numerous embedded URLs pointing to other PDF files hosted on various domains. This suggests a phishing or SEO spam campaign designed to distribute malicious content or redirect users to harmful sites.

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://submergeministries.com/uploads/1/3/0/8/130813732/5991169.pdf
    • http://domainchangers.com/uploads/1/3/0/6/130621596/bewebesalun.pdf
    • http://travailleurperformancehorses.com/uploads/1/3/0/6/130639351/wufukimisizo.pdf
    • http://villasdiamante.com.mx/uploads/1/3/0/7/130739928/zotoxamowugi-povavaver-puweso.pdf
    • http://www.jacquelinebrewerfineart.com/uploads/1/3/0/6/130620279/refigegari.pdf
    • http://bigbonedfitness.com/uploads/1/3/0/5/130588724/23843d9.pdf
    • http://how2teachreading.com/uploads/1/3/0/4/130489081/salis.pdf
    • http://lataco.net/uploads/1/3/0/6/130621840/dipus.pdf
    • http://406heatingandcooling.com/uploads/1/3/0/3/130313484/besoxeru_zifebunelin_bupiromufabu.pdf
    • http://www.hempworx-oil.com/uploads/1/3/0/3/130324207/valeso.pdf
    • http://remis-surfschool-capferret.com/uploads/1/3/0/8/130873875/wujefi.pdf
    • http://www.loppnows.com/uploads/1/3/0/6/130639571/6930077.pdf
    • http://www.ognbn.com/uploads/1/3/0/6/130621193/wuraxul.pdf
    • http://refutingthedoubts.com/uploads/1/3/0/6/130639236/giwanorikogife_lawoke.pdf
    • http://www.lilarot-vipshop.eu/uploads/1/3/0/2/130289427/130289427.html#common+noun+and+proper+noun+exercise+for+class+2

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000294a.bin
7c47f36f227b60a0d3fdace55272bce685c17e70cbac26cfca4f377d23b74d52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x294A 7908 bytes

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