Malicious PDF — malware analysis report

Static analysis result for SHA-256 87112abcfd4cfa00…

MALICIOUS

PDF

52.4 KB Authoring application: Mobipocket Creator
MD5: a39843d4f7247918e7a5b827f3ddbfcb SHA-1: 512cdc391fc8c9c058c541dce1c70c373c48d057 SHA-256: 87112abcfd4cfa00b4514c1c0f95732a60f020ec88dbb70f94d1a8d6dfabb00f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily corrupted, contains references to URLs that are consistent with the link farm heuristic. 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://hostmaster.salvadors.cn/uploads/1/3/0/6/130621583/9277268.pdf
    • http://irisperth.org/uploads/1/3/0/6/130620542/vajofib-tigobubijuvadin.pdf
    • http://beardgrowthplus.com/uploads/1/3/0/6/130639786/1573405.pdf
    • http://mysyracuse.com/uploads/1/3/0/6/130621226/488791f0c1052c.pdf
    • http://neurorehabkent.com/uploads/1/3/0/7/130775400/vakavavizoje-zerakepopamak.pdf
    • http://babyfreebies2020.com/uploads/1/3/0/6/130620195/6331259.pdf
    • http://olsoncarpentry.com/uploads/1/3/0/2/130289375/tevidip_dezagebijaji_gitatevelu.pdf
    • http://montevistacalvarybaptist.org/uploads/1/3/0/4/130435583/fosiputaza.pdf
    • http://www.neemconsulting.net/uploads/1/3/0/6/130621058/1af15b02113.pdf
    • http://ukrehabadvice.com/uploads/1/3/0/6/130603673/xutewuvo.pdf
    • http://absolutefloorsllc.com/uploads/1/3/0/2/130272435/2866d1f.pdf
    • http://www.picturesbygerry.net/uploads/1/3/0/2/130289763/23b836decd5a7e2.pdf
    • http://telltwistedpear.com/uploads/1/3/0/8/130814467/bozes_roretoba_mevarubijuvi_bolemesatexapu.pdf
    • http://texasitv.com/uploads/1/3/0/6/130639511/povifodex.pdf
    • http://www.mlumm.de/uploads/1/3/0/7/130775320/zexubokewovokepe.pdf
    • http://mariorosa.net/uploads/1/3/0/6/130639054/mifim.pdf
    • http://modemarketingsolutions.com/uploads/1/3/0/3/130379315/sidaviwupidad.pdf
    • http://favefoto.com/uploads/1/3/0/5/130551264/541071.pdf
    • http://axesatmobility.net/uploads/1/3/0/7/130775384/9319389.pdf
    • http://advancedliferesources.com/uploads/1/3/0/6/130604091/6620255.pdf
    • http://bestself.studio/uploads/1/3/0/2/130289732/28fbe9f20a.pdf
    • http://bobcatinfo.org/uploads/1/3/0/5/130538931/375ec0a8ea1c.pdf
    • http://heavensentlawnmanicurist.net/uploads/1/3/0/2/130270907/130270907.html#ayurveda+kapha+breakfast+recipes

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001051.bin
0ac5d6e6c3c92589dcb526a31fa180a70c78866e9d9a176eadee488e7226699c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1051 8496 bytes

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