Malicious PDF — malware analysis report

Static analysis result for SHA-256 f299278dd4156346…

MALICIOUS

PDF

39.7 KB Authoring application: Serif PagePlus
MD5: dfe34280e4c01aa215fc76e1ff1af95c SHA-1: f74b226c9da72421c7e63efe7f8da747cb251cc9 SHA-256: f299278dd4156346326449c17c0826657bf12db28b5e2b77958d53bfdd1817fd
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted from this sample, so the primary attack vector appears to be the distribution of links within the document.

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://imprezaconnection.com/uploads/1/3/0/2/130289096/9702859.pdf
    • http://www.newb-sa.org/uploads/1/3/0/6/130640025/vababebi.pdf
    • http://greengoodnessproject.org/uploads/1/3/0/7/130775205/0c2d0ceb.pdf
    • http://siestayouthchorale.org/uploads/1/3/0/4/130436136/sikemunetuwu.pdf
    • http://fountainheadhotelswbc.devsite-1.com/uploads/1/3/0/5/130550874/zibeza-wenuliko-motaj-vixedarujinat.pdf
    • http://talbotkids.net/uploads/1/3/0/4/130435929/92ca365fb0.pdf
    • http://daddysduties.com/uploads/1/3/0/3/130313471/621244.pdf
    • http://ns.positiveriding.com/uploads/1/3/0/2/130289475/7395660.pdf
    • http://www.theklinegallery.com/uploads/1/3/0/4/130488509/jinodunonajot.pdf
    • http://paraglidinginkorea.com/uploads/1/3/0/5/130550714/budolatimogubol-goxasibonam-setasopo.pdf
    • http://lindsaypulsipher.net/uploads/1/3/0/7/130776425/1410862.pdf
    • http://citizens-medicare.com/uploads/1/3/0/5/130590462/27ad481c8a0d7dc.pdf
    • http://mrramsay.co.uk/uploads/1/3/0/7/130739564/wavogozogegusubewa.pdf
    • http://terriguy.com/uploads/1/3/0/6/130621746/512d749e48696d.pdf
    • http://theyellowvanfurnitureco.com/uploads/1/3/0/6/130621119/2f74503a.pdf
    • http://cityonloc.com/uploads/1/3/0/7/130740011/130740011.html#plate+load+test+for+bearing+capacity

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003f03.bin
7778d2715cd55b07fbf49836616fb5da2cb4ac65a289953b39d365044bf62dad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3F03 8456 bytes

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