Malicious PDF — malware analysis report

Static analysis result for SHA-256 355e8faf044c65e7…

MALICIOUS

PDF

43.3 KB Authoring application: Nitro PDF
MD5: 022c11ce9e13b2983855b9ab397eb38b SHA-1: ce29216b3047443072a4e6cb6bd355b4d8d11392 SHA-256: 355e8faf044c65e750f14ed7dd33e71f778846365e86e3f8fbf747eb80d44e45
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs are the primary indicators of compromise, pointing to potentially malicious or compromised sites.

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://northeastmarineelectric.com/uploads/1/3/0/6/130622110/1025accfce72.pdf
    • http://dougzanderart.com/uploads/1/3/0/5/130588675/8377b9467e34.pdf
    • http://velvetleafglobal.com/uploads/1/3/0/6/130639836/jupasox_vufufaxob_kizugejeto_tepojaz.pdf
    • https://julizivuzesu.weebly.com/uploads/1/3/0/5/130547069/bevaxiwutetite.pdf
    • http://nuwod.dekocasa.com/uploads/2020/01/28/joxafufeluju.pdf
    • http://dinnerandacupcake.com/uploads/1/3/0/5/130590310/xulamagugapuwub.pdf
    • http://morongovalley.org/uploads/1/3/0/6/130620956/9f3c3.pdf
    • http://reva.solutions/uploads/1/3/0/5/130588621/4847094.pdf
    • http://blockchainambassador.ca/uploads/1/3/0/2/130288318/130288318.html#past+simple+present+simple+present+continuous+exercises+online

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001482.bin
002986cd66f215c05413352cf8d09e5200075235ee2898dbca5502ce5c482f57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1482 8796 bytes
font_01_sfnt_off00006258.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6258 16204 bytes

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