Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ce3e170b8378f7…

MALICIOUS

PDF

45.9 KB Created: 2020-04-05 15:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fe83ee1afd2cdb0931ca00e5acf7605f SHA-1: 836d511f8db89f6794d5e8903e2f58fa4ae053b0 SHA-256: 36ce3e170b8378f74e7378be09193f958e6f9249eb7647ec23df9946b92e3efd
70 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. This pattern is indicative of a link farm or SEO poisoning attack, designed to lure unsuspecting users into downloading potentially malicious content. The document body mentions 'Samsung galaxy tab 4 nook sm-t230', suggesting a lure to attract users interested in such devices. The presence of numerous PDF links, including one to 'shushu.us', strongly suggests a malicious intent to distribute further malware or phishing content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://planetaconsulting.ca/uploads/1/3/1/4/131438167/131438167.html#samsung+galaxy+tab+4+nook+sm-t230
    • http://shushu.us/uploads/1/3/0/5/130546880/roruresugiwif.pdf
    • http://born2wintrust.org/uploads/1/3/0/3/130323131/numejegizaxa_vilusorul.pdf
    • http://premierneuroinstitute.com/uploads/1/3/0/4/130476276/pusilu_xavirena_zurodopegodose_verelegikexo.pdf
    • http://citizensarmory.net/uploads/1/3/0/9/130969027/vugolajasaxuwa.pdf
    • http://mikelscottart.com/uploads/1/3/0/2/130288430/nuxibime_vagefibetekoza_kaxobowanud_tofabalijosux.pdf
    • http://wifespiration.com/uploads/1/3/0/8/130874364/kisazatibunixol.pdf
    • http://cincydraft.com/uploads/1/3/0/2/130272234/puzobajowufawugef.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089dc.bin
f3dfabcd320ea21f71652b3588c67c847d406b0797d1dd29c4a009112df276d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89DC 8688 bytes

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