Malicious PDF — malware analysis report

Static analysis result for SHA-256 eefb8ea2cef1b4df…

MALICIOUS

PDF

44.1 KB Authoring application: PDFBox
MD5: 19a1ffa1298522afc915e72624da91e4 SHA-1: e640a1c88d876b5420a92893f83f68606771bfec SHA-256: eefb8ea2cef1b4df11728e180e3a73f32df938336b27c267b5a9194ddba53fcf
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies the mass linking behavior, with the primary URL being http://drivesuperiorcarriers.com/uploads/1/3/0/7/130775531/jobozuvesazum.pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://drivesuperiorcarriers.com/uploads/1/3/0/7/130775531/jobozuvesazum.pdf
    • http://qualitymain.com/uploads/1/3/0/5/130590658/60157b03ea11ef.pdf
    • http://luiscunha.net/uploads/1/3/0/2/130270743/xexoxuletetobuvok.pdf
    • http://ilovefatjack.net/uploads/1/3/0/5/130546118/dijagevotikiba.pdf
    • http://heeratees.com/uploads/1/3/0/6/130639976/kozekikokuni_nuliwejoxu_mufazegap.pdf
    • http://msschatz4thgrade.com/uploads/1/3/0/6/130621794/2042645.pdf
    • http://silvercitygifts.com/uploads/1/3/0/3/130379291/nozetosodepopobusu.pdf
    • http://kimberlysfarmsflowers.com/uploads/1/3/0/7/130776268/bijudo.pdf
    • http://bestforexrebates.com/uploads/1/3/0/6/130621643/riwofitajimiwosafur.pdf
    • http://eugeneylee.com/uploads/1/3/0/6/130639123/duruv.pdf
    • http://stucolovphotography.com/uploads/1/3/0/6/130620943/bfd8f.pdf
    • http://youngmenofrespect.org/uploads/1/3/0/2/130289214/juwedubibajixurar.pdf
    • http://newyorksocialpages.com/uploads/1/3/0/6/130621245/pididozuzid.pdf
    • http://www.kinsley-walker-p-1.rominastiebenphotography.com/uploads/1/3/0/8/130815093/8610494.pdf
    • http://tmsmllc.com/uploads/1/3/0/5/130588277/pepagebujixonuvusaj.pdf
    • http://livemusicgozo.com/uploads/1/3/0/2/130271094/a8e1160fca.pdf
    • http://riseroofer.com/uploads/1/3/0/6/130639233/4512163.pdf
    • http://rvisions.net/uploads/1/3/0/4/130435877/pawoxenexujawez_buwofapud_liwozata_lolame.pdf
    • http://aspiringafricans.org/uploads/1/3/0/5/130588216/bufevuvoxenoxa.pdf
    • http://empireofthedead.org/uploads/1/3/0/6/130621546/xanore-denunumu.pdf
    • http://msgray.org/uploads/1/3/0/7/130775685/065d183e82e.pdf
    • http://scottbrackenridgebuilders.co.nz/uploads/1/3/0/6/130639729/2892635d57.pdf
    • http://ekcoelearningcommons.com/uploads/1/3/0/6/130620529/mobuti.pdf
    • http://trentriverdesigns.com/uploads/1/3/0/5/130550716/130550716.html#macbeth+dagger+scene+sparknotes
    • http://youngmenofrespect.o

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003283.bin
ddc6c38a5929b263b215a5b0c7aa8b1a409f146866f06980111f9f21a6232bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3283 16036 bytes
font_01_sfnt_off000049b3.bin
ce99c833e96e6555affecdb4d84cbb79670b2fc3b6cee0d922a6fe475b5521bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49B3 8044 bytes

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