Malicious PDF — malware analysis report

Static analysis result for SHA-256 c77f6df52c4337f7…

MALICIOUS

PDF

42.2 KB Created: 2020-04-05 13:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a4f3c64363248317295efaa76683cfe4 SHA-1: 640f318f3f78c861a8620f54eb58ed2324b010a5 SHA-256: c77f6df52c4337f734f9ffaa602c96434202fe07c6cca2a8868cd9795e431455
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or SEO poisoning technique, designed to drive traffic to potentially malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, and the document body text is heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link manipulation.

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.
  • 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://standmagazine.net/uploads/1/3/0/3/130324037/130324037.html#fools+love+kdrama+review
    • http://nativesnectar.com/uploads/1/3/1/4/131406893/c0680.pdf
    • http://northshorepharmacychiropractic.com/uploads/1/3/0/2/130287883/winuwonotorinobiso.pdf
    • http://roziesgreattips.com/uploads/1/3/0/3/130379155/3336057.pdf
    • http://bussgeldonline.com/uploads/1/3/0/2/130273735/c0904059377d.pdf
    • http://shadesailsfla.com/uploads/1/3/0/9/130969728/lozanubidito_komudu_dunine_lugupufom.pdf
    • http://tokatayouthcenter.com/uploads/1/3/0/4/130488850/zulevutid-goxoro-bubatiwi-zijipadepol.pdf
    • http://samantha-marsilla.com/uploads/1/3/0/8/130874635/rinasisozepev.pdf
    • http://c3pluriel.nl/uploads/1/3/0/6/130604018/8041497.pdf
    • http://transformyouraudition.com/uploads/1/3/1/4/131407918/2488079.pdf
    • http://nickmitchellmusic.net/uploads/1/3/0/6/130640084/nuwusivezeka-fikafosipok.pdf
    • http://retctours.solutions/uploads/1/3/0/2/130289461/lutumekidekefivi.pdf
    • http://salonpinkbus.com/uploads/1/3/0/7/130740211/3b4b36f029be719.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_off00007d39.bin
0ed5b8bf2af2f2fa7c4248beba814d86af2c544fdc422547606ebb257866ddaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D39 7880 bytes

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