Malicious PDF — malware analysis report

Static analysis result for SHA-256 38030eb8ef610bf1…

MALICIOUS

PDF

48.8 KB Authoring application: pdf-parser First seen: 2020-09-24
MD5: 1065305b20ae6942634d1e77d3c299b9 SHA-1: 984c6885e45dbf85b1718cd7e7d64657e28bf66f SHA-256: 38030eb8ef610bf14a330c489864f95af0ed36add6e046a6e081e537f4e6b024
192 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or redirection mechanism designed to lead users to malicious content. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a phishing or malicious redirection intent. The embedded URLs are the primary IOCs for this attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://nordicwarriortraining.com/uploads/1/3/0/4/130490444/pevugi.pdf In PDF document text
    • http://natbayley.com/uploads/1/3/0/6/130605077/1727702.pdfIn PDF document text
    • http://dustbuster.us/uploads/1/3/0/6/130639575/2379987.pdfIn PDF document text
    • http://northpacifictrainingperformanceinc.com/uploads/1/3/0/6/130604938/gipos-pitazexujeda-rekenurolaru-moludogakera.pdfIn PDF document text
    • http://storedesigns.in/uploads/1/3/0/6/130621892/buxedekif-jexipal-zizusaxet.pdfIn PDF document text
    • http://theelfbox.com/uploads/1/3/0/7/130776877/130776877.html#songs+pk+app++freeIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1 8852 bytes
SHA-256: 8a2c20281da6ddeb056315e73d64688204d0d4ab7d6cc9781b062671cc2bf50e
font_01_sfnt_off00005642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5642 16028 bytes
SHA-256: ca889182d22413b1a5b6446cd5d954c095bfc2c8b2fec1022b19199100617195
font_02_sfnt_off00006b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B80 15072 bytes
SHA-256: 66c12c6c82f25490ce0a68786087faae0f0da0f00f23d913153d8d56d7da1893

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