Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd55e05291918c12…

MALICIOUS

PDF

37.0 KB Authoring application: Scribus
MD5: ec7e1e2ee35f9d7071cca45809d64524 SHA-1: 17883a58c73e00594ca0c4026aa93f157a593338 SHA-256: cd55e05291918c12a26082fa98769ea3dba3bb350fd6080d1e35cac9e7681f3f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The primary attack pattern involves directing users to a link farm of potentially malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://propertypopups.com/uploads/1/3/0/6/130604032/bokiworobeve.pdf
    • http://ncpimaging.com/uploads/1/3/0/6/130604653/zupidagida.pdf
    • http://new2ufashions.net/uploads/1/3/0/2/130289662/demove-munoritus.pdf
    • http://yourfurbaby.com/uploads/1/3/0/4/130483751/a7064aa1.pdf
    • http://tujugejox.audiostart41.icu/uploads/2020/01/28/7367112.pdf
    • http://rajojare.paiementfm.fr/uploads/2020/01/28/nenale.pdf
    • http://ashestoashesband.com/uploads/1/3/0/5/130588415/vowibezojajegepav.pdf
    • http://rainfordvillage.co.uk/uploads/1/3/0/4/130435594/9921123.pdf
    • http://duplexdoctor.com/uploads/1/3/0/7/130738631/zekatetepoke-zunupafa-patoxoxemud-bijugokesupa.pdf
    • http://ucaninstall.net/uploads/1/3/0/5/130541803/64022b4a7a.pdf
    • http://mrmacbiblebook2.com/uploads/1/3/0/7/130738889/130738889.html#chinese+portrait+if+i+were

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011b6.bin
f5d62d8b8c2c75ff326466c0b7ea43a84937c3276ac51ddd76f35ca348e778c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6 7548 bytes
font_01_sfnt_off000049e3.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49E3 16036 bytes

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