Malicious PDF — malware analysis report

Static analysis result for SHA-256 87112abcfd4cfa00…

MALICIOUS

PDF

52.4 KB Authoring application: Mobipocket Creator First seen: 2020-09-04
MD5: a39843d4f7247918e7a5b827f3ddbfcb SHA-1: 512cdc391fc8c9c058c541dce1c70c373c48d057 SHA-256: 87112abcfd4cfa00b4514c1c0f95732a60f020ec88dbb70f94d1a8d6dfabb00f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, indicating a link farm or a distribution mechanism for further content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or SEO abuse. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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 In PDF document text
    • http://irisperth.org/uploads/1/3/0/6/130620542/vajofib-tigobubijuvadin.pdfIn PDF document text
    • http://beardgrowthplus.com/uploads/1/3/0/6/130639786/1573405.pdfIn PDF document text
    • http://mysyracuse.com/uploads/1/3/0/6/130621226/488791f0c1052c.pdfIn PDF document text
    • http://neurorehabkent.com/uploads/1/3/0/7/130775400/vakavavizoje-zerakepopamak.pdfIn PDF document text
    • http://babyfreebies2020.com/uploads/1/3/0/6/130620195/6331259.pdfIn PDF document text
    • http://olsoncarpentry.com/uploads/1/3/0/2/130289375/tevidip_dezagebijaji_gitatevelu.pdfIn PDF document text
    • http://montevistacalvarybaptist.org/uploads/1/3/0/4/130435583/fosiputaza.pdfIn PDF document text
    • http://www.neemconsulting.net/uploads/1/3/0/6/130621058/1af15b02113.pdfIn PDF document text
    • http://ukrehabadvice.com/uploads/1/3/0/6/130603673/xutewuvo.pdfIn PDF document text
    • http://absolutefloorsllc.com/uploads/1/3/0/2/130272435/2866d1f.pdfIn PDF document text
    • http://www.picturesbygerry.net/uploads/1/3/0/2/130289763/23b836decd5a7e2.pdfIn PDF document text
    • http://telltwistedpear.com/uploads/1/3/0/8/130814467/bozes_roretoba_mevarubijuvi_bolemesatexapu.pdfIn PDF document text
    • http://texasitv.com/uploads/1/3/0/6/130639511/povifodex.pdfIn PDF document text
    • http://www.mlumm.de/uploads/1/3/0/7/130775320/zexubokewovokepe.pdfIn PDF document text
    • http://mariorosa.net/uploads/1/3/0/6/130639054/mifim.pdfIn PDF document text
    • http://modemarketingsolutions.com/uploads/1/3/0/3/130379315/sidaviwupidad.pdfIn PDF document text
    • http://favefoto.com/uploads/1/3/0/5/130551264/541071.pdfIn PDF document text
    • http://axesatmobility.net/uploads/1/3/0/7/130775384/9319389.pdfIn PDF document text
    • http://advancedliferesources.com/uploads/1/3/0/6/130604091/6620255.pdfIn PDF document text
    • http://bestself.studio/uploads/1/3/0/2/130289732/28fbe9f20a.pdfIn PDF document text
    • http://bobcatinfo.org/uploads/1/3/0/5/130538931/375ec0a8ea1c.pdfIn PDF document text
    • http://heavensentlawnmanicurist.net/uploads/1/3/0/2/130270907/130270907.html#ayurveda+kapha+breakfast+recipesIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051 8496 bytes
SHA-256: 0ac5d6e6c3c92589dcb526a31fa180a70c78866e9d9a176eadee488e7226699c