Malicious PDF — malware analysis report

Static analysis result for SHA-256 128bde6491c04ddc…

MALICIOUS

PDF

53.1 KB Authoring application: OpenOffice.org
MD5: ffb0bbc9b85bb6efa4d327811a01e257 SHA-1: 333aef1d0ba44ffd6c19af3302e8c2e41319c196 SHA-256: 128bde6491c04ddc10b31b40bdda7bee51f99554c99c3bfedc9b1288ba4394d4
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links to other PDF files, disguised as educational resources. This technique is commonly used to distribute malware or phish for credentials. The ClamAV detection and ML classifier strongly indicate malicious intent, and the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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
  • 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://caltempmissionb.org/uploads/1/3/0/6/130604136/8827b6e.pdf
    • http://vdspilates.com/uploads/1/3/0/6/130604036/d8fe3aec3d.pdf
    • http://brokerboots.com/uploads/1/3/0/6/130621815/9576528.pdf
    • http://auburnlakesviera.com/uploads/1/3/0/6/130604765/9f945dbfd7feb.pdf
    • http://dibbledabblemedia.com/uploads/1/3/0/6/130621798/kimezo.pdf
    • http://minnieripertonfund.org/uploads/1/3/0/5/130588703/1345988.pdf
    • http://newsoft-softava.weebly.com/uploads/1/3/0/4/130490155/7835107.pdf
    • https://zajatute.weebly.com/uploads/1/3/0/5/130589264/mewofufajolukis-befizumi-lekozabuloworo-vutidumolagofi.pdf
    • http://colorbrushcanvas.com/uploads/1/3/0/6/130620861/filupavip_zaxupek.pdf
    • http://beingself-centered.com/uploads/1/3/0/6/130621024/130621024.html#free+reading+comprehension+worksheets+for+sixth+grade

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012de.bin
b9762b035202a03e281aa87137c3d55956175e08a0bad8ff07e3d16fb2962d84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE 8276 bytes

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