Malicious PDF — malware analysis report

Static analysis result for SHA-256 445e1c73897a986f…

MALICIOUS

PDF

44.5 KB Created: 2020-03-29 13:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 661827f38721ef47fc0eb215e2caaa6e SHA-1: 647bc3ea2713632d1c996958519dade0b5112670 SHA-256: 445e1c73897a986fef5f2a5d1d414d0000e1f79b151aa7f1c59c3f0a09bd4fb6
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 of which point to other PDF files hosted on various domains. This suggests a link farm or SEO poisoning tactic designed to drive traffic to these external resources. The document body itself is largely unreadable, but the presence of the URL http://sta-66-99-58-208.ladse.org/uploads/1/3/0/4/130483751/130483751.html#cosas+con+p+mayuscula within the document text and the heuristic firings confirm the malicious intent of linking to external content.

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://sta-66-99-58-208.ladse.org/uploads/1/3/0/4/130483751/130483751.html#cosas+con+p+mayuscula
    • http://ns.sjoachim.org/uploads/1/3/0/8/130814129/gegakasovu_sozesigef_kumifala.pdf
    • http://southernseminarycollege.com/uploads/1/3/0/3/130379803/vamam_mokajita_zasuzo.pdf
    • http://rosansashida.com/uploads/1/3/0/4/130489350/rusawumubuniwe.pdf
    • http://roninyoshino.com/uploads/1/3/0/9/130969019/zivujufugawenitub.pdf
    • http://katmcmillin.com/uploads/1/3/0/4/130483903/kexutixepu-zinitarot-zisevikajoreguj-lirivox.pdf
    • http://integraldevelopmentinitiatives.net/uploads/1/3/0/5/130543019/mepojusiw.pdf
    • http://getquadrant.com/uploads/1/3/0/2/130287995/33b32a00bb.pdf
    • http://cheesecakeonastick.us/uploads/1/3/0/7/130775634/dunus.pdf
    • http://galleryindustries.com/uploads/1/3/0/5/130589229/gesosanixivixewigub.pdf
    • http://hardingeducationresourcecenter.com/uploads/1/3/0/2/130292014/1ec6ea70.pdf
    • http://kriscustomsewing.com/uploads/1/3/0/5/130539992/rebegizipax.pdf
    • http://wonaccounting.com/uploads/1/3/0/7/130738825/kisalujaje_gurapevadafubi.pdf
    • http://juliaconeillustration.com/uploads/1/3/1/4/131407655/kagef-robusitoror-vodokol.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_off00006e74.bin
af2f04f21e9ebbef9680029f6973f523323a5b9a958b82c4d9b368bef6ec9013		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E74 8960 bytes
font_01_sfnt_off00008efa.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFA 16036 bytes

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