Malicious PDF — malware analysis report

Static analysis result for SHA-256 b44d6ec7dda94a0c…

MALICIOUS

PDF

22.3 KB Authoring application: PDF Studio
MD5: c763564fe7465a35f094ba85d66831b2 SHA-1: 35b879cc030ddfcc3ce0cf858f1ee893ab4ab249 SHA-256: b44d6ec7dda94a0c3d354cefd63dd42570dee915c8d95b63f06a63e86c29246b
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique commonly used for SEO spam or to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness. The document body text appears to be corrupted or truncated, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 2

  • 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.
  • 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://sunshineorganizingsupport.com/uploads/1/3/0/6/130604859/diduxepaf.pdf
    • http://www.wileytek.com/uploads/1/3/0/7/130776341/pawig-noxugivamiwi.pdf
    • http://workplacesafetyvictoria.com/uploads/1/3/0/6/130605341/gowakisow.pdf
    • http://www.dynamicallyfocused.com/uploads/1/3/0/8/130874570/xozas-kexubuseter.pdf
    • http://kyatwobirmans.com/uploads/1/3/0/4/130483863/voxowunilebegug.pdf
    • http://jennyoakley.com/uploads/1/3/0/5/130588727/muwopolonikinipodizi.pdf
    • http://cpanel.ngabwe.com/uploads/1/3/0/6/130621798/bofozotujuvinunokiru.pdf
    • http://rockandrowel.com/uploads/1/3/0/3/130323251/kirusererimowo.pdf
    • http://valleycapitalrealty.net/uploads/1/3/0/4/130488884/8357749.pdf
    • http://tocinstitute.com/uploads/1/3/0/6/130603851/7b94609.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001fa5.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA5 16204 bytes
font_01_sfnt_off000037d1.bin
a58639180376c82006df901df9c549152a8cf5c708acff24213e2cf946268d16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37D1 8956 bytes

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