Malicious PDF — malware analysis report

Static analysis result for SHA-256 905cb7edc7b5f66c…

MALICIOUS

PDF

39.2 KB Authoring application: pstoedit
MD5: 1563c59db4edde6408293f1f0831d784 SHA-1: 58275a40326abf86a180668c4612dfff7a7f5d3a SHA-256: 905cb7edc7b5f66ca255a11fdd227d158e17411dcd8244271e2680a99698378e
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a mass external link farm, with multiple URLs pointing to other PDF files. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the presence of embedded URLs strongly suggest a phishing or malware distribution campaign. The document body text, though partially corrupted, includes phrases like 'Complete english grammar pdf' and a call-to-action, reinforcing the lure for users to download further content.

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kobomvelik.alta.si/uploads/1/3/0/6/130604657/jufesajuvebedu_pazeg.pdf
    • http://dickwoody.com/uploads/1/3/0/5/130590777/004db3d802e.pdf
    • http://nylarose.co/uploads/1/3/0/7/130739348/lanowadevixu.pdf
    • http://tin-card.pro/uploads/2020/01/28/dowosutudojunup-wufojojunisu-kazuzovu.pdf
    • http://shopsheldons.com/uploads/1/3/0/6/130604979/7db21b220069.pdf
    • http://ticketmenow.us/uploads/1/3/0/5/130551405/f3c53bd0.pdf
    • http://bakeabetterpie.com/uploads/1/3/0/2/130291441/9093099.pdf
    • http://ellabelleslime.com/uploads/1/3/0/5/130539553/zejav.pdf
    • http://bejustalittlebetter.com/uploads/1/3/0/4/130483767/130483767.html#complete+english+grammar+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011f8.bin
c0e3cb65d9195fa1657e1dbda012cb928328d98215426973f75c178a399740d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8 9296 bytes

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