Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f4e99c6dc24063…

MALICIOUS

PDF

40.2 KB Created: 2020-03-07 20:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fcdf16c0563703609cda197e6021ae92 SHA-1: 68edda4764ed1ea5aa40511fc13ca3983d26f476 SHA-256: d4f4e99c6dc2406357b8d5037a6657320a162309206eb5bb88f6cb1ffdfd8e8e
94 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, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL, http://ddct-24-4-crs-4g-100m.pleasingfood.com/uploads/1/3/0/6/130621385/130621385.html#explain+macbeth%27s+soliloquy+in+act+2+scene+1, and many others point to PDF files on various domains. This suggests the document is designed to manipulate search engine results or to serve as a gateway to other malicious content. No scripts were extracted, and the document body is largely unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ddct-24-4-crs-4g-100m.pleasingfood.com/uploads/1/3/0/6/130621385/130621385.html#explain+macbeth%27s+soliloquy+in+act+2+scene+1
    • http://massimocapra.net/uploads/1/3/0/7/130738628/babubologip.pdf
    • http://federalcheeseband.com/uploads/1/3/0/3/130323199/7220384.pdf
    • http://www.thecartcurator.com/uploads/1/3/0/2/130271165/tawepapatuz-vurabire.pdf
    • http://melfoster.co/uploads/1/3/0/6/130621233/1891203.pdf
    • http://credo.news/uploads/1/3/0/4/130488513/75cfc34527ab.pdf
    • http://mail.mixelle.net/uploads/1/3/0/5/130551805/wibaner-funedi-doxosevaxizere-ropibitu.pdf
    • http://oaktreephotos.com/uploads/1/3/0/7/130738939/8d9792d8.pdf
    • http://383919308752394594.com/uploads/1/3/1/0/131071113/b2115d6b619.pdf
    • http://nichellerenee.solutions/uploads/1/3/0/2/130291800/2217174.pdf
    • http://micromulsion.com/uploads/1/3/0/6/130639305/4023078.pdf
    • http://thechristofbasingstoke.com/uploads/1/3/0/4/130488273/puxoj.pdf
    • http://offshorefishingseq.com/uploads/1/3/0/4/130477702/nalevenubufu.pdf
    • http://www.theprismwithin.com/uploads/1/3/0/6/130639669/8054071.pdf
    • http://campuscleaningireland.com/uploads/1/3/0/8/130874063/lojezofufitavi.pdf
    • http://acutabovelawncare.org/uploads/1/3/0/4/130483122/rerakexir-rezokilowax.pdf
    • http://metronycouplestherapy.com/uploads/1/3/0/6/130604395/7d2f1450d6faa.pdf
    • http://restoration.fit/uploads/1/3/0/6/130621477/46938b8c8.pdf
    • http://stetic.ca/uploads/1/3/0/4/130488569/1f6fcc57573.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_off00007139.bin
ecc55eddb0e71446e0eca910333262bb9b33634420ba623ef3d91d0e4fd5de75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7139 8408 bytes

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