Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8b75fb06f5f28d…

MALICIOUS

PDF

48.6 KB Created: 2020-03-15 13:27:10 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e25ce6ae85fc3ff621e73d5fa3d3d5bd SHA-1: 80d9790f884946bd4f49599f89ada619a9f89b1f SHA-256: 2c8b75fb06f5f28db6c183be066fda776315ac45668b4876abea5d19b9a7560e
72 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 PDF files hosted on various domains. The document body, though partially corrupted, contains a lure related to 'whatsapp status in tamil free' and includes embedded URLs. This suggests a link farm or SEO poisoning tactic designed to drive traffic to potentially malicious content. The primary heuristic indicates a PDF URI pointing to a link farm, and another heuristic flags a mass of external PDF links.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://host172.carmichaelnl.com/uploads/1/3/0/5/130588344/130588344.html#best+whatsapp+status+in+tamil+free
    • http://dirtysoles305.com/uploads/1/3/0/6/130621947/191c5ae.pdf
    • http://www.behdaar.org/uploads/1/3/0/2/130287371/fukotaboz.pdf
    • http://www.1cafedumarche.ch/uploads/1/3/0/9/130969510/bifovakesif-tatibiru.pdf
    • http://www.no-quo.com/uploads/1/3/0/5/130543684/mupowemekawaxuj.pdf
    • http://thegoldengate.net/uploads/1/3/0/4/130489696/kimapomirukunerira.pdf
    • http://audioofne.com/uploads/1/3/0/4/130489070/5144b2b0c.pdf
    • http://companypast.com/uploads/1/3/0/8/130814293/pibuto-nipalewor.pdf
    • http://www.artmuralist.com/uploads/1/3/0/5/130589348/654773f96e447.pdf
    • http://katrinapruss.com/uploads/1/3/0/8/130874403/9461378.pdf
    • http://www.mylocalprintpartner.com/uploads/1/3/0/7/130738969/af16bb7.pdf
    • http://www.cheneyandcheney.com/uploads/1/3/0/4/130488940/9728043.pdf
    • http://staritzen.com/uploads/1/3/0/8/130813077/1574126.pdf
    • http://blackrock-advertising.com/uploads/1/3/0/7/130776123/8b9fbb48cd642.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fde.bin
5d69dc40c21a6a11c3d8d439ce3cb26a50df510b8a516cb43ee2e8399dbd038e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDE 13696 bytes
font_01_sfnt_off000094a2.bin
0df9f0d00e6f6ff4587791dc61f74500bf077065dfc080bff67706b14c4a9766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94A2 7804 bytes

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