Malicious PDF — malware analysis report

Static analysis result for SHA-256 66fbc4701e3c86d0…

MALICIOUS

PDF

72.2 KB Authoring application: Mobipocket Creator
MD5: 669fbc307eb3376a170d95463b2685f5 SHA-1: 60c752aa3dde26010d34ccd70546469ff2002640 SHA-256: 66fbc4701e3c86d067480b2c7576f82c7608765eaaf706395089da665043191e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to other PDF files, suggesting a link farm designed to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' and ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly indicate a phishing or malware distribution campaign. While no scripts were directly extracted, the nature of the embedded links implies a mechanism for delivering further malicious payloads, likely through JavaScript execution within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jezetta.com/uploads/1/3/0/7/130739328/bokirutufotiginadiv.pdf
    • http://kenbugulfilm.com/uploads/1/3/0/6/130620551/4173731.pdf
    • http://826.bpmtc.com/uploads/1/3/0/8/130874475/wevirumorugir_gaxovunemoj_desitamorov_vemiwozanaf.pdf
    • http://juntamugre.net/uploads/1/3/0/7/130740069/dinorukax.pdf
    • http://communiqueventures.com/uploads/1/3/0/4/130476859/649c45519d3d6d.pdf
    • http://mindfulcare.nl/uploads/1/3/0/7/130776478/bojuvofose.pdf
    • http://nataliebritecoaching.com/uploads/1/3/0/6/130604616/2720495.pdf
    • http://theelectricspace.com/uploads/1/3/0/3/130323449/jamufuk.pdf
    • http://brandgrenade.com/uploads/1/3/0/7/130776693/letawujeb.pdf
    • http://halfmarathonrankings.com/uploads/1/3/0/3/130324158/jowewunefamo-gepovubunixo.pdf
    • http://bethechangenw.org/uploads/1/3/0/4/130488273/aa3be.pdf
    • http://mrcmuskogeerevivalcenter.org/uploads/1/3/0/7/130740163/vaparivokivo.pdf
    • http://hapicos.com/uploads/1/3/0/5/130590583/9079182.pdf
    • http://playtopfounder.net/uploads/1/3/0/3/130323143/relinefagobe.pdf
    • http://thanksidc.org/uploads/1/3/0/4/130483204/palusuzosavomodaput.pdf
    • http://nooracademyonline.com/uploads/1/3/0/7/130739449/2463061.pdf
    • http://sonjaweilguny.at/uploads/1/3/0/6/130604150/pofisez-tavotiga.pdf
    • http://amandamckelt.com/uploads/1/3/0/2/130289430/4623574.pdf
    • http://theimaginarybanquet.org/uploads/1/3/0/4/130476814/d7f9f15e710e.pdf
    • http://sales11-sip-phone.pleasingfood.com/uploads/1/3/0/7/130738855/130738855.html#army+study+guide+pdf+2018
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015ba.bin
f380e9c5077cb436887f1d1697c09ba61989edd8b80058a201b85b143750b52d
pdf-font-stream PDF embedded font (sfnt) at offset 0x15BA 8836 bytes
font_01_sfnt_off0000d607.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
pdf-font-stream PDF embedded font (sfnt) at offset 0xD607 16036 bytes