Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d822020196c1bf…

MALICIOUS

PDF

36.2 KB Authoring application: pdf-parser
MD5: e9add20b1d53ff98bfc531ba7e59c892 SHA-1: c207710263f06deb0183497b55f50d4a6451d5ea SHA-256: e9d822020196c1bfdff2b2500731e85c0933bb3b6cff1ad701bca5dad20f82a1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to other PDF files hosted on various domains, indicative of a link farm. This is likely intended to manipulate search engine rankings or to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, and the heuristic 'PDF_SEO_LINK_FARM' directly supports this attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://newchoicemusic.com/uploads/1/3/0/6/130605143/5857072.pdf
    • http://cpanel.airlinepilotservice.com/uploads/1/3/0/7/130775751/kakokafununid.pdf
    • http://theentrepreneurtales.com/uploads/1/3/0/5/130543155/7042315.pdf
    • http://phoenixzx.com/uploads/1/3/0/3/130324241/neleresav_wigagifitus_favuluzezavomit_larepajojo.pdf
    • http://nicolemontagna.com/uploads/1/3/0/6/130639062/b2e38e5885936.pdf
    • http://justincrowestudio.com/uploads/1/3/0/6/130639153/fotubemix_pebewedexetugo_zunejafif_lawirima.pdf
    • http://mountainrogueranch.com/uploads/1/3/0/6/130622111/bojiwurogug.pdf
    • http://sigmascout.com/uploads/1/3/0/7/130738503/715802.pdf
    • http://ankezimmermann.ca/uploads/1/3/0/6/130621210/kowibokokorupuwizubo.pdf
    • http://ndlobmac.com/uploads/1/3/0/3/130323818/3326481.pdf
    • http://74-123-75-164.mgwnet.com/uploads/1/3/0/4/130478484/130478484.html#acls+2015+exam+questions

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000330a.bin
440dd862f303896b9b5e2d310696ca77ce7880f01eb6eb3a191bab6d3e9566f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x330A 9460 bytes

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