Malicious PDF — malware analysis report

Static analysis result for SHA-256 768a803cfd2d15e9…

MALICIOUS

PDF

77.0 KB Authoring application: Poppler-utils First seen: 2020-09-07
MD5: f02af828b7acc05e1cc9d02899404a0d SHA-1: 547203c850799136a1e1fa75252e314cf01c5569 SHA-256: 768a803cfd2d15e90d220b73f8848a485f7513e7db8722d6b4dbd052b6df048a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, indicative of a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL distribution pattern suggest it's part of a phishing or malware distribution campaign.

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 http://annamariecrowhurst.com/uploads/1/3/0/4/130483389/febupib.pdf In PDF document text
    • http://lampkinsridgestudio.com/uploads/1/3/0/5/130540046/xunamavam.pdfIn PDF document text
    • http://wikipf.com/uploads/1/3/0/7/130740003/947109.pdfIn PDF document text
    • http://tamilstudies.com/uploads/1/3/0/8/130813509/7970721.pdfIn PDF document text
    • http://passionatepursuit.net/uploads/1/3/0/7/130739655/9996876.pdfIn PDF document text
    • http://bluedevilsmania.com/uploads/1/3/0/6/130621315/jesimobewono.pdfIn PDF document text
    • http://battnetwork.com/uploads/1/3/0/6/130621366/zizexes_romepomedu_rojodu.pdfIn PDF document text
    • http://hoppes.us/uploads/1/3/0/8/130813798/zaxipu-jaxisev-fesilo.pdfIn PDF document text
    • http://mhs1983.net/uploads/1/3/0/3/130323167/xuxenimonin-sizotuwuti.pdfIn PDF document text
    • http://countygarden.net/uploads/1/3/0/4/130435638/zadariw.pdfIn PDF document text
    • http://farmingtonpta.org/uploads/1/3/0/5/130540402/mifava.pdfIn PDF document text
    • http://misscarladance.org/uploads/1/3/0/6/130620719/sodeta.pdfIn PDF document text
    • http://rwandalawoffice.com/uploads/1/3/0/5/130539016/fejugalubik.pdfIn PDF document text
    • http://kershawlutheran.org/uploads/1/3/0/6/130604778/dinuwapezokevunusa.pdfIn PDF document text
    • http://newworldcreator.com/uploads/1/3/0/6/130604948/60d518671.pdfIn PDF document text
    • http://apartzurich-german.devsite-1.com/uploads/1/3/0/4/130476237/130476237.html#impact+of+structural+adjustment+programme+in+zambiaIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048d1.bin
f928c5c638943ae2e997c93cba14769b7a624f63547fed1c570a748b9832df98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48D1 8100 bytes

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