Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b2dc0905454e82…

MALICIOUS

PDF

66.9 KB Authoring application: Serif PagePlus First seen: 2020-09-24
MD5: 7c06a27890411d6017196fc6c404ad97 SHA-1: a1a54c707e7ac6f848ead7bc163aa0743c713431 SHA-256: 78b2dc0905454e823f01bcd92e8e8bc9eef3ec1a035b3b2c8848cd0d632f262c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier strongly indicate maliciousness, with the file being classified as Pdf.Phishing.TtraffRobotInstall. The embedded URLs likely lead to phishing pages or further malware distribution, and the document body is heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://studioprbozeman.com/uploads/1/3/0/6/130621654/begofova_mepimivala.pdf In PDF document text
    • http://nesteam.co.il/uploads/1/3/0/6/130605178/joxanirusumib_wegiviw_terovinumag.pdfIn PDF document text
    • http://bepipiroko.sapsan-logistics.com/uploads/2020/01/29/8588974.pdfIn PDF document text
    • https://tilezerufad.weebly.com/uploads/1/3/0/4/130489168/2198059.pdfIn PDF document text
    • http://tomorrowlogy.com/uploads/1/3/0/4/130492441/genubujanemafu_gojipiwevazede_mejetetedimijav_dejetowag.pdfIn PDF document text
    • http://kwpetcarecypress.com/uploads/1/3/0/6/130621383/1c43f.pdfIn PDF document text
    • https://vidomaxe.weebly.com/uploads/1/3/0/4/130483457/nomujef-pedikudeke.pdfIn PDF document text
    • http://drstellamedicalintuition.com/uploads/1/3/0/5/130551704/kedagano_tupemidutu.pdfIn PDF document text
    • http://valdineschroeder.com/uploads/1/3/0/6/130622104/7881b9778.pdfIn PDF document text
    • http://tenur.zorfa.icu/uploads/2020/01/28/jomeximofenesojudu.pdfIn PDF document text
    • http://blockchainambassador.ca/uploads/1/3/0/7/130739443/130739443.html#achyut+godbole+books+in+marathiIn PDF document text
    • http://linux.thai.net/projects/fonts-tlwgIn PDF document text
    • http://www.thaitux.infoIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E3 9580 bytes
SHA-256: b362865204e2818180f17512aa4a5fbbb843d530001fe1c05cb95f9cb72b0941
font_01_sfnt_off0000725a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725A 16028 bytes
SHA-256: ca889182d22413b1a5b6446cd5d954c095bfc2c8b2fec1022b19199100617195
font_02_sfnt_off0000878e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x878E 14300 bytes
SHA-256: d81d3f072ae6a69ce6cf180ae67d3fdeb130488ae5ca04cabd93c36ee7bd5927
font_03_sfnt_off0000aae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAE5 15996 bytes
SHA-256: ca9df63ad9cb40efe1509e4f8838bf9837984638ea354bd25f6038962d0edefb