Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa54e16b183cae9…

MALICIOUS

PDF

50.2 KB Authoring application: OpenOffice.org First seen: 2021-08-20
MD5: 07c711426b921e6eb8ffd18ba8cf43fd SHA-1: a9c3a8f7694618ea767f4e7c8b4a070c010389b1 SHA-256: efa54e16b183cae9c1a1b856b88bcf4067c72c8d4dc7948ebe4c3a339537628f
152 Risk Score

Malware Insights

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

The PDF contains a link farm with multiple URLs pointing to other PDF files, a common technique for distributing malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://rachelskaufman.com/uploads/1/3/0/6/130603682/3229899.pdf In PDF document text
    • http://porunmundomejorr.weebly.com/uploads/1/3/0/5/130590499/wopesofoviwo.pdfIn PDF document text
    • http://neurologiccare.com/uploads/1/3/0/3/130313221/6db7252f02a44fc.pdfIn PDF document text
    • http://riverrepublicproductions.com/uploads/1/3/0/4/130483345/3bd3c2292e.pdfIn PDF document text
    • http://tawiraga.gateadcc.info/uploads/2020/01/29/bijuriwu.pdfIn PDF document text
    • http://baselandspice.com/uploads/1/3/0/2/130291624/7075382.pdfIn PDF document text
    • http://asharedjourney2018.com/uploads/1/3/0/4/130483341/fajejepovaketo.pdfIn PDF document text
    • http://audreylooksat.com/uploads/1/3/0/5/130538994/rafopavodefikurixo.pdfIn PDF document text
    • http://newrichmondoh.org/uploads/1/3/0/7/130739538/130739538.html#diccionario+biblico+gratis+para+descargarIn 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_off00001280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280 10116 bytes
SHA-256: a37c037d0b77c353132f071438b1c8947f55a56988e43df2463088510e8ef277
font_01_sfnt_off000073cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CB 19556 bytes
SHA-256: 6a987a855d99250d4832f78656e100d0bc5cb515ae4ff9d3ba03c4b9688b0f3b

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