Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6fbc935bef18ea…

MALICIOUS

PDF

131.8 KB Authoring application: OpenOffice.org
MD5: 015eab78f1d12957691d59e0e615f450 SHA-1: fc30bc65cad1a9bf22a8e26f65ca14341fcc457d SHA-256: 9a6fbc935bef18ea830990bc10d510235e58a38d80078db06c15d0df8a454f27
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body text, though heavily obfuscated, mentions "Algorithms by robert sedgewick pdf download", suggesting a lure to trick users into downloading potentially harmful files.

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://christilsed.com/uploads/1/3/0/6/130621382/5d21b7cae0c.pdf
    • http://americanoverheaddoorsnewyork.com/uploads/1/3/0/3/130379379/424217e.pdf
    • http://bungareelabradoodlepups.com/uploads/1/3/0/5/130540402/wofodoxup.pdf
    • http://baohay.org/uploads/1/3/0/5/130588360/0b7edf1f.pdf
    • http://zentdd.com/uploads/1/3/0/8/130814513/9452727.pdf
    • http://bukudata.com/uploads/1/3/0/2/130289246/4012213.pdf
    • http://chrismulloydmd.com/uploads/1/3/0/4/130476468/kapigidele.pdf
    • http://clintonstudio54.com/uploads/1/3/0/4/130435987/2875745.pdf
    • http://moodage.net/uploads/1/3/0/3/130312998/8664227.pdf
    • http://strippersinaustin.com/uploads/1/3/0/4/130483184/xafar_duviwonepazuvaz_gamolapu.pdf
    • http://juxtaprose.net/uploads/1/3/0/5/130539344/3173957.pdf
    • http://mx.sissybella.com/uploads/1/3/0/5/130588345/debofexutokakita.pdf
    • http://theselfishparents.net/uploads/1/3/0/2/130272340/6619092.pdf
    • http://growtem.com/uploads/1/3/0/7/130775201/5183367.pdf
    • http://otownpyle.com/uploads/1/3/0/6/130604250/9843216.pdf
    • http://cafecancun.us/uploads/1/3/0/4/130483833/gezefebawu.pdf
    • http://red-poker.net/uploads/1/3/0/5/130550794/6e3ff82f4c4.pdf
    • http://70-mph.com/uploads/1/3/0/8/130874118/5729783.pdf
    • http://bailefangyulechengkaihudizhi.br3h.com/uploads/1/3/0/8/130814921/130814921.html#algorithms+by+robert+sedgewick+pdf+download
    • http://christilsed.com/uploads/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005667.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5667 16036 bytes
font_01_sfnt_off00006e83.bin
863c1e3654ea6d670681a8df66d3fb18b01aa9093f99d73c2530797c1934bf80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E83 10452 bytes
font_02_sfnt_off00013a59.bin
b37262ffd4b622d4ae765d83ea525951f46084f378621bacc8a47f4bb81d1350		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A59 2012 bytes

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