Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d2457787f6bcf2…

MALICIOUS

PDF

35.6 KB Created: 2020-04-07 06:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 55e12f4438da2f87613fc6e193d5b8b0 SHA-1: 58969c291a0b7efe8b90804c9763ff5d4778cbb9 SHA-256: e7d2457787f6bcf2f9f84423766c9d81c9cd779427019b3ab9a15d79468663fe
62 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, a technique often used in SEO spam or to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm or distribution network. The document body, though partially corrupted, contains a title related to chemistry and the wkhtmltopdf generator, but the primary malicious activity appears to be the extensive linking to external PDF files.

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://cequime.com/uploads/1/3/0/5/130588344/130588344.html#tabla+de+alcanos+alquenos+y+alquinos+del+1+al+10
    • http://riverfrontwellness.com/uploads/1/3/0/6/130603931/kajoliwubikedow.pdf
    • http://gotchuwhipd.com/uploads/1/3/0/9/130969459/4418990.pdf
    • http://utahfilmcomposer.com/uploads/1/3/0/6/130604863/kovik.pdf
    • http://liveauctionevents.net/uploads/1/3/0/8/130874347/zokagujefobozevu.pdf
    • http://threewomen.net/uploads/1/3/0/5/130539034/8f96d15542e3b2f.pdf
    • http://rachelgiddens.com/uploads/1/3/0/5/130544823/xiteleb.pdf
    • http://petsspotter.com/uploads/1/3/0/4/130483454/jaxunemuno.pdf
    • http://themuvement.org/uploads/1/3/1/4/131406701/3756187.pdf
    • http://zzdesigns.net/uploads/1/3/0/8/130814914/sokidafafexonexezumo.pdf
    • http://knoxvilleangels.org/uploads/1/3/1/4/131408256/8634058.pdf
    • http://coachphilblack.com/uploads/1/3/0/2/130271060/130fd2c5.pdf
    • http://kidscodesiliconvalley.com/uploads/1/3/0/6/130621219/fubitota.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_off000062bc.bin
1d7a645114c446126d54aab45bd4e5c7082ffda74fe4ef6a1e7f17ed620d5a23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BC 8184 bytes

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