Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97b6865420cd2ff…

MALICIOUS

PDF

37.5 KB Created: 2020-04-17 02:38:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: abefe524d5e7d8b4a0d8002430c33ac7 SHA-1: b7706561b2db824b860668a8c541302f421a19d7 SHA-256: b97b6865420cd2ff4b0d24414bf70b96e8d00f48e35a5676e3f2eb48467367f4
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous external links, a technique often used in SEO spam or link farms to drive traffic to malicious sites. The document body, though partially corrupted, suggests a lure related to a 'gas hot water heater manual'. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm.

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://cool-it.org/uploads/1/3/0/7/130738921/130738921.html#ao+smith+gas+hot+water+heater+manual
    • http://boutmybestfriend.com/uploads/1/3/1/4/131408139/3327031.pdf
    • http://bluerioventures.com/uploads/1/3/0/6/130605116/8623954.pdf
    • http://liquorjunky.com/uploads/1/3/0/4/130494743/7607411.pdf
    • http://justuschildrenbooks.com/uploads/1/3/0/6/130639370/8168877.pdf
    • http://aesircoils.com/uploads/1/3/0/5/130550948/52255.pdf
    • http://beat-cbd.com/uploads/1/3/0/8/130873864/7462476.pdf
    • http://monicavegaonline.com/uploads/1/3/0/5/130589427/980444.pdf
    • http://drgimbel.com/uploads/1/3/0/9/130969483/98dbfb9fca51f.pdf
    • http://customercarespecialist.net/uploads/1/3/0/9/130969341/jofoxixaboso.pdf
    • http://overtuigd.com/uploads/1/3/1/6/131606866/wupasubelenabof.pdf
    • http://spiritualfertilitybootcamp.com/uploads/1/3/0/8/130874204/7600842.pdf
    • http://sarahallcleaning.com/uploads/1/3/0/9/130969933/3c53c01a9878.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_off00006b93.bin
2be3616e1976f7bb2c647770fa1b7fe1a0dacafca0991e933554d37d7cd80600		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B93 7772 bytes

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