Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1fb37eee8304516…

MALICIOUS

PDF

51.8 KB Authoring application: Mobipocket Creator
MD5: 31718e22068032942d9e6b4aadbf68d9 SHA-1: 90f7cf7f906802102687cebea63cc905d0eff834 SHA-256: f1fb37eee83045167484ad09e4de250282ea32233f25585ddbcc146271060517
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malware. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The heuristic 'PDF_SEO_LINK_FARM' confirms the presence of a mass external PDF link farm, with the first URL being http://wholehealthdiscoverycenter.net/uploads/1/3/0/5/130590153/pajabujo-vuxijalotimobol.pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://wholehealthdiscoverycenter.net/uploads/1/3/0/5/130590153/pajabujo-vuxijalotimobol.pdf
    • http://basementcityproductions.com/uploads/1/3/0/6/130620927/mapopudojagutagunade.pdf
    • http://tripbuys.com/uploads/1/3/0/6/130605471/2903547.pdf
    • http://kosmokayla.com/uploads/1/3/0/6/130604397/deborawagezosod.pdf
    • http://synthetics78.com/uploads/1/3/0/7/130776346/670eca01488720.pdf
    • http://www.alexhernandezlawfirm.com/uploads/1/3/0/5/130545633/15ba7d3a61868.pdf
    • http://nanomat2019.com/uploads/1/3/0/6/130604104/wugomovolimuvir_xavugage_vupupupi_jomebaza.pdf
    • http://enkonte.com/uploads/1/3/0/8/130874669/rujejavamupur.pdf
    • http://factorygreenhouses.com/uploads/1/3/0/6/130620372/50655c9d31.pdf
    • http://chloe-communications.com/uploads/1/3/0/4/130476076/dagivonoxom.pdf
    • http://wyandottespringsurbanfarm.com/uploads/1/3/0/2/130272582/sifogawo.pdf
    • http://believe-in-pets.com/uploads/1/3/0/7/130776640/kalelog-waxapadujaze-bezuboduxobu.pdf
    • http://alisonreber.com/uploads/1/3/0/4/130491271/25664beabd1.pdf
    • http://333tool.com/uploads/1/3/0/6/130604685/eaf05a5422c57.pdf
    • http://nhfd-dev-site.com/uploads/1/3/0/3/130379167/mepadu_rurilo.pdf
    • http://reklam5.net/uploads/1/3/0/7/130739239/0bf06ef26d48.pdf
    • http://colleenjoanjohnson.com/uploads/1/3/0/2/130272472/cf8c523558f188.pdf
    • http://acc-guhotelandconferencecenter.com/uploads/1/3/0/3/130313671/lunubejikunosivum.pdf
    • http://www.zontanorthsydney.com/uploads/1/3/0/4/130436458/potog.pdf
    • http://newhomeswithashley.com/uploads/1/3/0/7/130776484/d60cff3abe31c3.pdf
    • http://gohomechicken.com/uploads/1/3/0/3/130379121/lakij-lekojufedulu-tevasuju-gasomevavob.pdf
    • http://beckandclem.com/uploads/1/3/0/8/130814715/nukobagegabufumi.pdf
    • http://vixenpromakeup.com/uploads/1/3/0/4/130476760/3883022.pdf
    • http://mykwalk.com/uploads/1/3/0/7/130775507/jabitonamonunis.pdf
    • http://yohanaespectaculos.com/uploads/1/3/0/4/130476162/8e56289b2731.pdf
    • http://gnsi7.bpmtc.com/uploads/1/3/0/5/130538995/130538995.html#aegis+100w+manual

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032a8.bin
6e6b13a8a1f2fea76cb2b27368baa07039a702747744673544516ec196d717a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32A8 17136 bytes
font_01_sfnt_off000049b7.bin
cfb3357b20fb01955c1e4a0ed568c791e3a97db8f0fbaa18432a833eaa1d19da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49B7 2828 bytes
font_02_sfnt_off00005300.bin
9e990faaba3d6d9389d453044a07a97ad40adb8ac477127380f91f5d2a73148b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5300 4416 bytes
font_03_sfnt_off0000639c.bin
83065b807b1aed0fd23119621c6d18d1787181bd1f654e981967a4e548eae37f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639C 8696 bytes

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