Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a46da0d1d1817dc…

MALICIOUS

PDF

33.3 KB Created: 2020-05-21 13:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9438b0a8d86b9824f94f2afe29af1005 SHA-1: 95863808d705f9322e42ef36e78a8a3f030a757d SHA-256: 4a46da0d1d1817dc50c98c1a84f1f834739969962deaa60dee71f2c6d332bbd4
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to various domains, a technique often used for SEO link farming or to distribute malicious content. The document body itself is heavily obfuscated but contains references to the URLs. The primary attack pattern involves directing users to a network of PDF files hosted on numerous domains, likely to generate traffic or serve as a landing page for further malicious activity. No scripts were extracted, limiting the analysis of direct payload execution.

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://referral360network.com/uploads/1/3/0/5/130588954/130588954.html#excursions+in+modern+mathematics
    • http://albinutamimi.com/uploads/1/3/0/6/130639325/6c3457f9.pdf
    • http://optimusdiaz.org/uploads/1/3/0/5/130589346/walokuw.pdf
    • http://alumnicareers.org/uploads/1/3/0/6/130620757/625912.pdf
    • http://prostogogolf.com/uploads/1/3/0/5/130542909/pexobuvofotefil.pdf
    • http://propowerwashingllc.com/uploads/1/3/1/4/131438557/nixibareviwime-zosigiwesowega-radugujugugekuj.pdf
    • http://duncanwaldron.com/uploads/1/3/0/7/130739688/3f362b1164b9b.pdf
    • http://usagaslogs.com/uploads/1/3/0/5/130539897/2716813.pdf
    • http://heritageblues.com/uploads/1/3/0/9/130968911/af1de16a1542ff.pdf
    • http://windsongvilla.com/uploads/1/3/0/6/130620689/4133355.pdf
    • http://progressivealliance.website/uploads/1/3/0/7/130776246/c02f0.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_off000058c5.bin
dbd0daaf224b9d547b274456f9f983a9e616068880194058eca7bdf4b55b409b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C5 9848 bytes

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