Malicious PDF — malware analysis report

Static analysis result for SHA-256 051413a2dc265f7f…

MALICIOUS

PDF

39.4 KB Authoring application: Solid Converter PDF First seen: 2021-06-04
MD5: 6fe95a5bccdaa1c85523b8e7f84fcf3e SHA-1: 8d835dc7860e279f144ae33b637e64e80a5b6644 SHA-256: 051413a2dc265f7f84c89624303f85f24c2c9ddc9e71ba8f0a0e60b54a6f2800
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to external PDF files hosted on Weebly, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or phishing campaign designed to drive traffic or distribute further malicious content. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 https://tukavalorom.weebly.com/uploads/1/3/0/2/130288380/9bed5528f337093.pdf In PDF document text
    • https://fakigerekonedo.weebly.com/uploads/1/3/0/4/130476688/sumijesurovenez.pdfIn PDF document text
    • https://daxovazevo.weebly.com/uploads/1/3/0/3/130323803/kikodadivitetex-xevowebozije-xokevarutif-dofinajitosudep.pdfIn PDF document text
    • https://balasebanuwo.weebly.com/uploads/1/3/0/3/130323568/kirevefatiguk.pdfIn PDF document text
    • https://refifetukinobev.weebly.com/uploads/1/3/0/3/130379902/refonawaza_mevevera_pivemuxakebil.pdfIn PDF document text
    • https://zakaxulanules.weebly.com/uploads/1/3/0/2/130273624/bopigaxipujug-piresugigiwaj.pdfIn PDF document text
    • https://mukotonenadefe.weebly.com/uploads/1/3/0/2/130272318/258ff5.pdfIn PDF document text
    • https://wiwizizunenitu.weebly.com/uploads/1/3/0/4/130436525/130436525.html#acetaminophen+dosage+infant+weightIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1 8696 bytes
SHA-256: 5dca02b63773de579ac58c5bd1ec44d48754fc4249be336c26df22a6ad22a733
font_01_sfnt_off00005380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5380 16068 bytes
SHA-256: 6db2f878e0fd57d3a351d0d81a5ccd7b58f68df6728dadc3aee3ebeb1a1d6e60

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