Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdcb4b84fdc2c12…

MALICIOUS

PDF

33.5 KB Authoring application: SWFTools
MD5: eedbefa381a8955eefc0001d475d72e9 SHA-1: 310f923b1dbda92fd2ed0dc43532538582675bcd SHA-256: 6bdcb4b84fdc2c12b5a6a3ed853a764a05c64030756dc5923863aee1bcbd37f1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various external PDF files. This behavior is indicative of a link farm or a mechanism to distribute further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but 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://artfromlondonmarkets.com/uploads/1/3/0/2/130287914/mekuditifev.pdf
    • http://austinhighmaroons.weebly.com/uploads/1/3/0/6/130603878/kobagul.pdf
    • http://bukawuzewo.tovarug.icu/uploads/2020/01/28/91b16ea37906.pdf
    • http://vaxeduwif.speacetech.us/uploads/2020/01/28/36e9feb0962b50.pdf
    • http://asisuppliermarketing.com/uploads/1/3/0/3/130313766/11670.pdf
    • http://managewisconsin.com/uploads/1/3/0/5/130589334/b5455.pdf
    • http://tren.net/uploads/1/3/0/5/130590312/1b5cb90d4162.pdf
    • http://uprradiology.org/uploads/1/3/0/6/130605149/9379592.pdf
    • http://nytsattui.com/uploads/1/3/0/2/130272325/zirogik.pdf
    • http://divinedwelling.org/uploads/1/3/0/5/130539113/siforuvowawudu.pdf
    • http://papa.st/uploads/2020/01/28/xekafate_sunutowu_penevekaxuf_zefuri.pdf
    • http://kennettyp.org/uploads/1/3/0/3/130313271/kivixuvirugore-kiruxu-samenukituv.pdf
    • http://newwavecarpetandtile.com/uploads/1/3/0/6/130604414/130604414.html#can+you++minecraft+bedrock+on+mac

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012ed.bin
90dd2301ed12212a13109a170d3e064e2c128b381faa4245f8d797c0b2e66cfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED 7908 bytes

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