Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ddc18e61412ff4b…

MALICIOUS

PDF

140.7 KB Created: 2020-04-07 18:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 02bdfbe1637ef61dd2457c51ad13bf80 SHA-1: 7754e476a484c61076e1305b3583d89d9f57fa3c SHA-256: 1ddc18e61412ff4bd31077f76475b74d6d777a88c3a53174d3a6ea006dc3827f
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 scam designed to drive traffic to various sites. The document body, though partially corrupted, contains text related to 'Edunation sejarah notes', suggesting a lure to attract users interested in educational content. No scripts were extracted, and the primary malicious activity appears to be the distribution of numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://popjetfountain.com/uploads/1/3/0/8/130814858/130814858.html#edunation+sejarah+notes
    • http://fleurdelys-club.org/uploads/1/3/0/6/130604434/b8ff4699.pdf
    • http://canndeco.com/uploads/1/3/0/4/130436162/bafejaxoxub.pdf
    • http://bshelart.com/uploads/1/3/0/6/130639254/sexufejog.pdf
    • http://jordankrimston.com/uploads/1/3/1/3/131383708/cb139457cc.pdf
    • http://chauffeurdrivenlondon.com/uploads/1/3/0/6/130621310/modixifemeveb.pdf
    • http://kamdynkelley.com/uploads/1/3/0/3/130323647/wuvenabub-kebenukis.pdf
    • http://tkandsandy.com/uploads/1/3/0/3/130379356/6067569.pdf
    • http://dtaylor88.com/uploads/1/3/0/4/130436209/396e3d483.pdf
    • http://cityofharlemmontana.com/uploads/1/3/0/6/130639947/7f5c1b8f.pdf
    • http://blackwallcompany.com/uploads/1/3/1/1/131163787/8715195.pdf
    • http://ameliavstanley.com/uploads/1/3/0/2/130272072/85daf1.pdf
    • http://onourwaytravel.com/uploads/1/3/0/3/130379083/rolap.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e4bb.bin
e3a9e11047269c7cf4a6fbb51afef18afbda0372a11e4498b45861fc2d1374b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E4BB 1700 bytes
font_01_sfnt_off0001ecd3.bin
d02185ac44a6198167890f74e42feb82cb5f43240317c171774c5828e60c96ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ECD3 8540 bytes
font_02_sfnt_off00020d9a.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20D9A 2616 bytes
font_03_sfnt_off000216a4.bin
a1e98d702da61a64b27f8eba7d17f87ed4b179c7029e8dd91cf3634515fe850b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x216A4 4152 bytes

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