Malicious PDF — malware analysis report

Static analysis result for SHA-256 a892de6a9ba73409…

MALICIOUS

PDF

35.1 KB Created: 2020-04-23 05:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 908818d4801cf8f01f52fb6fd564659d SHA-1: 596707e7e58e305b9b103d5b690e5d6bf3d41dbe SHA-256: a892de6a9ba734091bed8622b5c4a12e35fbcdb89fd13ef6f59e5fc962444e16
62 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains. The primary link in the document body suggests a lure for a checkbook register template. This pattern is indicative of a link farm or SEO poisoning technique used to distribute malicious content. No scripts were extracted, and the document body itself is heavily obfuscated, making it difficult to determine the exact second-stage payload.

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://redlandbaycranes.com/uploads/1/3/1/3/131384589/131384589.html#checkbook+register+template+for+microsoft+works
    • http://flamepointbirmanragdollkittens.com/uploads/1/3/0/6/130639409/591500.pdf
    • http://deltakappanu.com/uploads/1/3/1/6/131606482/sibev-duzuboduvojal-xalisofuwiku.pdf
    • http://soundslikesilence.org/uploads/1/3/0/8/130813592/tupezupekokitis.pdf
    • http://proyectofreedom.com/uploads/1/3/0/2/130289265/bumapodagakasemepeso.pdf
    • http://geekbucketlist.com/uploads/1/3/1/4/131412235/katinuk.pdf
    • http://wendijjensen.com/uploads/1/3/0/5/130544751/3918637.pdf
    • http://rubythefosterdog.com/uploads/1/3/0/6/130640072/towoz.pdf
    • http://londontoursandtravels.com/uploads/1/3/0/7/130738596/lomatemumixo_labapisimukeba.pdf
    • http://wendijjensen.com/
    • 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_off0000615f.bin
d5b8a277f664722dc387e8598b50de7d44c2874189848f634ba83407857f3172		 pdf-font-stream PDF embedded font (sfnt) at offset 0x615F 7924 bytes

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