Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b6027b0db3c192…

MALICIOUS

PDF

100.4 KB Authoring application: Pdftk First seen: 2020-09-24
MD5: df0281a76d42ddeace403ca5b5b677a1 SHA-1: 4f83639f638e97fb5fd83890fd889d0b9e14fdc8 SHA-256: 38b6027b0db3c192b5c9954a72e0976c327841d8d17e0139fd26f8a7c5602397
152 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The critical heuristic 'PDF_SEO_LINK_FARM' indicates the document contains numerous external links, primarily pointing to other PDF files hosted on various domains. This suggests a phishing or SEO poisoning attack, where the goal is to redirect users to potentially harmful content or to manipulate search engine rankings. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.michaellaconte.com/uploads/1/3/0/2/130289355/sidos.pdf In PDF document text
    • http://almanaquecircular.com/uploads/1/3/0/5/130551266/xejaripime_buwox_luzit.pdfIn PDF document text
    • http://webmail.kenreif.com/uploads/1/3/0/5/130550910/delavazelo.pdfIn PDF document text
    • http://www.theunwindingway.co/uploads/1/3/0/7/130739470/muzufagolixiw.pdfIn PDF document text
    • http://natureinnny.org/uploads/1/3/0/8/130814855/tuwizipakej-gexawisewas-zabex-lilorukobon.pdfIn PDF document text
    • http://www.centralvirginiacbd.net/uploads/1/3/0/7/130776299/2172175.pdfIn PDF document text
    • http://barbaraannkipferart.com/uploads/1/3/0/7/130740318/9839801.pdfIn PDF document text
    • http://kudzurva.com/uploads/1/3/0/8/130813756/nigupufotokokik.pdfIn PDF document text
    • http://integral2030.org/uploads/1/3/0/6/130620575/8066.pdfIn PDF document text
    • http://nachothumb.com/uploads/1/3/0/5/130545954/lapolu_jibinu_wemaxuk.pdfIn PDF document text
    • http://beingself-centered.com/uploads/1/3/0/4/130435588/130435588.html#pradhan+mantri+ayushman+bharat+yojana+eligibility+in+hindiIn PDF document text
    • http://fedorahosted.org/lohitIn 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_off0000e231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE231 16028 bytes
SHA-256: ca889182d22413b1a5b6446cd5d954c095bfc2c8b2fec1022b19199100617195
font_01_sfnt_off0000f64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64C 1388 bytes
SHA-256: 1723f1ced37cc89d69e30f3df6281c5e5fb8989544fd4587aa75b00c91af2fd0
font_02_sfnt_off00010175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10175 19656 bytes
SHA-256: 638cdc0678ba86e6e8cce907d3036d1f6101572705025db142f69236a4527d6a
font_03_sfnt_off00013646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13646 8128 bytes
SHA-256: 16e4bd9687879d28a945461ffb8bf5100a19118d70ff12bda75f2efe81f19875