Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df05559654557be…

MALICIOUS

PDF

34.6 KB Authoring application: Mobipocket Creator
MD5: 2451990fb5cf59f0cd5396fe4229b042 SHA-1: 078e1e18e8b0f126737a5f2356954e32eeaf0013 SHA-256: 7df05559654557bec591d306df445b24c0c13e94966afc0bbce0381b55eadfd9
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body appears to be corrupted or contains irrelevant text, but the heuristic firings are sufficient to determine the attack pattern. No scripts were extracted from this sample.

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://ns2.becksusedappliances.com/uploads/1/3/0/7/130739662/vutubusarugip-musar-widerinor-bemeg.pdf
    • http://carverarms.com/uploads/1/3/0/2/130272994/xufunuzaf.pdf
    • http://whm.cc-creativecomms.com/uploads/1/3/0/3/130313340/botumupukog.pdf
    • http://evernightmoon.com/uploads/1/3/0/6/130604582/sosotak-kagusexugakebop-jewuzo.pdf
    • http://wer4jesus.com/uploads/1/3/0/7/130740496/gijaxatexivevove.pdf
    • http://knowsbest.net/uploads/1/3/0/6/130639691/xobufikejelole.pdf
    • http://rachelmcoburn.net/uploads/1/3/0/7/130740217/vetobefo_mimanoposujigis_bafozusazetija.pdf
    • http://rawhidemotel.com/uploads/1/3/0/4/130436173/simexekomekaz.pdf
    • http://elysianresources.us/uploads/1/3/0/4/130488338/a9bb3.pdf
    • http://countylinelogisticscenter.com/uploads/1/3/0/4/130492771/zokutifofolugoz.pdf
    • http://balboacapitalgroup.com/uploads/1/3/0/7/130776272/folixub.pdf
    • http://numeracyshed.com/uploads/1/3/0/4/130435922/50831af4e9ec.pdf
    • http://sparkmechanical.com/uploads/1/3/0/5/130588216/0d3262.pdf
    • http://dronecoaches.com/uploads/1/3/0/6/130621132/2c2c5ba.pdf
    • http://acumensalestrainingconsultants.com/uploads/1/3/0/7/130776083/5042153.pdf
    • http://smtp1.tandem-co.com/uploads/1/3/0/8/130874606/tunupuxu-luladozusenet-benagarajefibu-bovisas.pdf
    • http://www.neemsounds.com/uploads/1/3/0/5/130551188/wobituwunero_katirumududi_foradow.pdf
    • http://docspaces.com/uploads/1/3/0/5/130541004/tovinu_kaxez_mevod_woxofer.pdf
    • http://wayjayjetwas.com/uploads/1/3/0/3/130312964/pomedobigolutovaduji.pdf
    • http://guoshengwangshangyule.br3h.com/uploads/1/3/0/8/130874629/130874629.html#the+concise+cambridge+history+of+english+literature+by+george+sampson
    • http://dronecoaches.com/uploads/1/3/0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000028ff.bin
85bd407294b4a7657284d4c663b93e18293731216cf902fd35e0519f9b231416		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28FF 7492 bytes

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