Malicious PDF — malware analysis report

Static analysis result for SHA-256 4592bb7593f62fd2…

MALICIOUS

PDF

40.4 KB Authoring application: Inkscape
MD5: e094bd794d2284bb8eec0c8a31195de0 SHA-1: f6f9a7aa8b8f1699f61042bd55d507fe1f612aba SHA-256: 4592bb7593f62fd29e2f99b88499d24f9368d1be7116b9e4428e1f04fd0bb55f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded links to other PDF files, disguised as exam papers. This technique, identified by the PDF_SEO_LINK_FARM heuristic, is commonly used to distribute malware or phish for credentials. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a malicious intent. The embedded URLs are the primary indicators of compromise.

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://recordingstudiospokane.com/uploads/1/3/0/5/130590462/maseruvewelir.pdf
    • http://northwesterntaekwondo.com/uploads/1/3/0/4/130483940/5081651.pdf
    • http://zefigu.viktoria-karta.ru/uploads/2020/01/28/fce80c6d.pdf
    • http://soloporque.org/uploads/1/3/0/4/130483351/vazojot.pdf
    • http://miralunacraniosacral.com/uploads/1/3/0/4/130436017/8780252.pdf
    • http://creepyoutfitlab.com/uploads/1/3/0/4/130488935/latolapavake-taluw-ligar.pdf
    • http://nicoleedwardslimited.net/uploads/1/3/0/6/130639739/tabuva-rujis-sujune.pdf
    • http://xrdsfaith.com/uploads/1/3/0/2/130274345/najawuvalaniz-lozojataladamos.pdf
    • http://ravenheim.net/uploads/1/3/0/6/130620972/4945607.pdf
    • http://vokivumije.gochu.ru/uploads/2020/01/28/juwatudugajeke-gosepik.pdf
    • http://aanddkin.com/uploads/1/3/0/4/130489351/2311969.pdf
    • http://amarbeck.com/uploads/1/3/0/6/130603985/a177d3400.pdf
    • http://miputt.com/uploads/1/3/0/5/130588605/romigo.pdf
    • http://our0genealogy.org/uploads/1/3/0/2/130270917/0f32bb575b74a6.pdf
    • http://lexigoldberg.com/uploads/1/3/0/2/130273610/009b41a2fa9bda4.pdf
    • http://blockchainbetterbusiness.com/uploads/1/3/0/5/130550910/soravugodemago.pdf
    • http://missveltriskindergarten.com/uploads/1/3/0/6/130620168/podoseses-mujaxepekis-saxodigekipid-vepizidate.pdf
    • http://wuva.pokupka-super10.ru/uploads/2020/01/28/posevurew_razivifogebures_ritigobivu_desijig.pdf
    • https://nekebopebufera.weebly.com/uploads/1/3/0/6/130604689/japenabomubebe.pdf
    • http://sawod.gateway-3ds.ru/uploads/2020/01/28/basuzedu.pdf
    • http://shardexplorers.com/uploads/1/3/0/6/130639642/130639642.html#afcat+question+paper+book+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000167b.bin
25a71d5d49dc0d660da7c5079f70f33998686248fc485adfccbbf6f2385d7978		 pdf-font-stream PDF embedded font (sfnt) at offset 0x167B 8612 bytes

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