Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a242e4fa6e33fff…

MALICIOUS

PDF

43.1 KB Created: 2020-04-17 17:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 613b8714ada0a95e165601d4eae1a57b SHA-1: 075512e5299d8e934a79086b4220ae217ffa19a1 SHA-256: 2a242e4fa6e33fffca75adce87f1a37c5927dcc54e10ce3f74c4aa55d754a82e
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to similarly structured URLs on different domains. This pattern is indicative of a link farm or SEO spam campaign, designed to drive traffic to various sites. The document body, though partially corrupted, mentions 'Ludwig's angina guidelines', suggesting a lure to entice users to click on the embedded links.

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://suppy-taiwan.com/uploads/1/3/0/4/130436431/130436431.html#ludwig%27+s+angina+guidelines
    • http://joyzwish.com/uploads/1/3/0/5/130588343/6596489.pdf
    • http://anansiadventures.com/uploads/1/3/0/4/130476340/af2f08189.pdf
    • http://sebastianprinz.net/uploads/1/3/1/3/131380177/1325676.pdf
    • http://outdoornurseryschool.com/uploads/1/3/1/1/131164251/xujepugurorisitovem.pdf
    • http://zulemareneesummerfield.net/uploads/1/3/0/5/130543333/5585417.pdf
    • http://jongerencollectief.com/uploads/1/3/0/7/130775776/betoz.pdf
    • http://speechlessineurope.org/uploads/1/3/1/4/131410434/2f8f0123d8fa.pdf
    • http://jamesstockhorst.com/uploads/1/3/0/7/130775674/bc8a858e350.pdf
    • http://sweetwatergalveston.net/uploads/1/3/0/9/130969707/0ee33d6de28c26a.pdf
    • http://yazzieestate.com/uploads/1/3/0/8/130814674/4021617.pdf
    • http://rentalcrossroads.com/uploads/1/3/1/6/131606674/9982921.pdf
    • http://joyzwish.com/uploads/1/3/0/5/130588343/65
    • 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_off00006b8e.bin
d8fccceeeceadca820bf5b1db78e46dcfc51c254bf73cd32f72eb9df2f17edef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8E 8224 bytes
font_01_sfnt_off00008b27.bin
de9ab7d3f801febf349f8627b7aa0c20fcf05f39190c656d73ff63bae9e1d702		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B27 16040 bytes

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