Malicious PDF — malware analysis report

Static analysis result for SHA-256 545e1dbc037b4c36…

MALICIOUS

PDF

34.2 KB Authoring application: Solid Converter PDF
MD5: b76a227c4c5f08a2758e4fc890d97778 SHA-1: a0cdc27bbb32fb57fbacb4789f7bfbf1df5bc410 SHA-256: 545e1dbc037b4c36bf05c94962b286ff4270a15c64b8da286d690d04b9fcf266
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains fragments suggesting it might be a lure related to online courses or certificates.

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://julietlambert.com/uploads/1/3/0/5/130588532/sovepumig_valexawa_fidemomifal.pdf
    • http://thetailory.net/uploads/1/3/0/6/130605380/2211100.pdf
    • http://longislandoverheaddoor.net/uploads/1/3/0/7/130739860/wetididusoge-sibipaxivavig-limazitinaxi-bipupibawa.pdf
    • http://twofacesonefist.com/uploads/1/3/0/2/130270793/523588.pdf
    • http://naomiquinnphotography.com/uploads/1/3/0/6/130639214/molutojadopamepad.pdf
    • http://propodcastcontrol.com/uploads/1/3/0/7/130776730/ranuxadaboj-noxir-lodema.pdf
    • http://natalietremblay.ca/uploads/1/3/0/6/130620700/pomogopisudatimav.pdf
    • http://puppyparentpro.com/uploads/1/3/0/5/130590096/1377463.pdf
    • http://silhomes.com/uploads/1/3/0/6/130605447/294d50423.pdf
    • http://qor.kz/uploads/1/3/0/7/130739607/1d9a8.pdf
    • http://taskforce38.org/uploads/1/3/0/8/130873818/losebaza_tijudabeda_nameludebibe.pdf
    • http://danwashburn.org/uploads/1/3/0/7/130775299/bcb50.pdf
    • http://angelschic.com/uploads/1/3/0/5/130551179/0d54f77e2d.pdf
    • http://maryleekemper.com/uploads/1/3/0/4/130476442/e7614cd2.pdf
    • http://0abe.brdge.org/uploads/1/3/0/5/130588980/130588980.html#udemy+course+certificate+on+linkedin
    • http://maryleekemper.com/uploads/1/3/0/4/130476442/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002bc8.bin
82eeb538e50455d17ce3ea0387c3733ae1d41e400e773655e529fbb000f5f051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC8 7828 bytes

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