Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9b9777f21729d8…

MALICIOUS

PDF

40.1 KB Created: 2020-04-22 08:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2ea6e2074dc77f0b48e1353e2b696084 SHA-1: 942a1c735589f060f2b97e4f6c8cbd15e02b261b SHA-256: dd9b9777f21729d85878b4fc9190e70de6ea55bea0c41b67d8e1cb04d3165903
72 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains numerous external links, many pointing to other PDFs, suggesting a link farm or SEO manipulation tactic. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into clicking links. The primary external URI found is http://realnursingrn.com/uploads/1/3/0/5/130588934/130588934.html#android+developer+tools, which likely serves as a lure to a malicious payload or phishing page.

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://realnursingrn.com/uploads/1/3/0/5/130588934/130588934.html#android+developer+tools
    • http://grayandcoprints.com/uploads/1/3/1/3/131380225/27022084b3.pdf
    • http://jbrosenterprises.com/uploads/1/3/0/5/130588885/dumuzenobezuw-bowagovawolisu-pizidut.pdf
    • http://motionfuels-arkansas.com/uploads/1/3/1/4/131452967/lasoxupenoxasovovo.pdf
    • http://fairview-holidays.com/uploads/1/3/0/9/130969200/nobar_bofopaxixiw_dodonetupi_xizisapiju.pdf
    • http://itslavish.com/uploads/1/3/0/7/130739674/jumudepixopi.pdf
    • http://cloghroens.ie/uploads/1/3/0/7/130776749/5303431.pdf
    • http://natanyaelmusic.com/uploads/1/3/0/5/130543170/jefek-dopifeja-bekinu.pdf
    • http://prgwellness.com/uploads/1/3/1/1/131163550/giguwubaxipa.pdf
    • http://buzzgenic.ca/uploads/1/3/0/2/130288511/8a0a4d8b14d1bc.pdf
    • http://spsgreeninnovation.org/uploads/1/3/0/7/130738792/3021474.pdf
    • http://wizardofov.org/uploads/1/3/0/2/130273762/3044026e00e68da.pdf
    • http://wedgelessform.com/uploads/1/3/0/3/130313027/9472600.pdf
    • http://professionalcarpetcleaningchelsea.com/uploads/1/3/1/0/131071145/kidelite-wowalonipowij-linapunuvo-zezadod.pdf
    • http://roosterrhymes.com/uploads/1/3/1/4/131483245/tamujegukide.pdf
    • http://professionalcarpetcleaningchelsea.co
    • 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_off000074a9.bin
2ce9d1f42357a6e9eebdfdaedec4b0dbf0b857ba82e0a0a4534d21e4c99303b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A9 8232 bytes

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