Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6e5d0835cf87fa6…

MALICIOUS

PDF

71.8 KB Authoring application: QPDF
MD5: 2a491d05b80c58a25dfa775f6e5114ad SHA-1: 7b4f512260012636a25b88b111298a04ded33fc5 SHA-256: f6e5d0835cf87fa6831bcf0ae10cbe7c1d6aa3f565b411e4870a6cbb1f1abf9f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. This strongly suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support the malicious nature of the file. No scripts were extracted from this sample.

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://pchelpformom.net/uploads/1/3/0/7/130775823/ed6c38f8cf9.pdf
    • http://errqre.com/uploads/1/3/0/6/130639270/9adeb095b71d8d.pdf
    • http://mirrormath.net/uploads/1/3/0/4/130488503/5561755.pdf
    • http://thedmsbard.com/uploads/1/3/0/6/130639344/e6c9a552b302.pdf
    • http://brite-technology.net/uploads/1/3/0/7/130775471/8947520.pdf
    • http://carolinaspconstruction.com/uploads/1/3/0/6/130605355/8569622.pdf
    • http://melbourneairbnb.com/uploads/1/3/0/5/130543256/4639274.pdf
    • http://promotingteaching.com/uploads/1/3/0/2/130291531/wunebiwixut-vixivesexas-jefojiwofidobig-sojamelened.pdf
    • http://squirrelremovalknoxville.com/uploads/1/3/0/5/130551505/3f5e72f9.pdf
    • http://moneytalkwithtiff.com/uploads/1/3/0/6/130620662/224516d72.pdf
    • http://nwrilg.net/uploads/1/3/0/6/130621574/4096522.pdf
    • http://didodey.vip/uploads/1/3/0/5/130551536/galirulid_xebimup_mirunixagosem.pdf
    • http://theordinaryvoter.com/uploads/1/3/0/6/130620678/5697230.pdf
    • http://nataliashand.com/uploads/1/3/0/6/130621382/9622712.pdf
    • http://mscbmx.com/uploads/1/3/0/7/130776399/komoxik.pdf
    • http://yhtgxs.bdgct.com/uploads/1/3/0/2/130289652/130289652.html#history+of+catholic+church+book+pdf
    • http://squirrelremovalknoxville.com/u

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041c3.bin
bbb7b68760ba9845e35ec697c2d0ef79411ab617657e924efd3e823dc4dfb80d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41C3 9172 bytes

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