Malicious PDF — malware analysis report

Static analysis result for SHA-256 18138546231b2baf…

MALICIOUS

PDF

36.7 KB Authoring application: Smallpdf Desktop First seen: 2020-09-07
MD5: 9cc678182f5e3db2de49ecaf8568f660 SHA-1: eed79c05f726641cfc1bd9bbe89c7f0a635c3d78 SHA-256: 18138546231b2bafbe5f22c7e48ccae776fd3ec45fb92cc0e51b62ad7fb7153c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to other PDF files hosted on various domains, suggesting a link farm or content distribution network. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://offbeetmedia.com/uploads/1/3/0/7/130739347/jiredafoniteviw.pdf In PDF document text
    • http://www.freydesigns.info/uploads/1/3/0/6/130621908/90ddb643b86c9.pdfIn PDF document text
    • http://origenpetfood.com/uploads/1/3/0/5/130588976/6283071.pdfIn PDF document text
    • http://bolaparada.site/uploads/1/3/0/5/130538939/maradul_rarawexifobi_kinedarevav_vatokokija.pdfIn PDF document text
    • http://hopefulwellness.com/uploads/1/3/0/4/130475923/daduz-golufore-silufutila.pdfIn PDF document text
    • http://simonwestlake.com/uploads/1/3/0/5/130590374/9325cb6e72.pdfIn PDF document text
    • http://gallabethministries.org/uploads/1/3/0/7/130740044/3681389.pdfIn PDF document text
    • http://myfloridamediation.org/uploads/1/3/0/7/130776169/negejulerap_wagonox_nezipurowe.pdfIn PDF document text
    • http://pawsitively-groovy.net/uploads/1/3/0/2/130288775/2507676.pdfIn PDF document text
    • http://vpacapital.com/uploads/1/3/0/8/130813779/darinerasabilit.pdfIn PDF document text
    • http://downriverkaraokeanddj.com/uploads/1/3/0/6/130621066/1d5556ebfde.pdfIn PDF document text
    • http://bigsoiree.com/uploads/1/3/0/7/130740044/tuzifevemijinujome.pdfIn PDF document text
    • http://host94.carmichaelnl.com/uploads/1/3/0/5/130588499/130588499.html#hernia+gastrica+pelo+hiato+esof%C3%A1gicoIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3653 9720 bytes
SHA-256: f53c7538ee1e75cd090e8be69647822465a7d4db1a764e3976927f4386973d6c

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