Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd0c70930324150…

MALICIOUS

PDF

41.5 KB Created: 2020-03-29 07:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 220f2c523e1ff08617c906fcb0d1c606 SHA-1: 7dad9aa7ab78919c1b174b9c452fcde8c02a74c9 SHA-256: 3cd0c7093032415010b7c0328e4837c6f6efcd9c6d6bd6d0f04d48b55810cb40
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO abuse tactic. The document body, while heavily obfuscated, contains URLs that are likely intended to redirect the user to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a social engineering attack.

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://74-123-79-231.mgwnet.com/uploads/1/3/0/5/130539936/130539936.html#example+iep+for+autism
    • http://supersecretprojectx.com/uploads/1/3/0/3/130323642/padexarutisa.pdf
    • http://daniyalsaudadvising.com/uploads/1/3/0/4/130476555/tibekobasizati_zizimefanete.pdf
    • http://www.art-prints-for-sale.shop/uploads/1/3/0/5/130544694/ludilapume.pdf
    • http://islandtreasuregifts.com/uploads/1/3/0/5/130540559/temukolibova.pdf
    • http://www.happyconezllc.com/uploads/1/3/0/6/130621734/norofarib.pdf
    • http://mrhstigerprint.com/uploads/1/3/0/3/130313470/kewefimezewizixa.pdf
    • http://dinosdelosmuertos.com/uploads/1/3/0/7/130738797/sebawi.pdf
    • http://k-1fiancee.visaconnection-philippines.com/uploads/1/3/0/5/130589182/botopijitu-suxekijuxawa-viwilorixeguso-zafowateguv.pdf
    • http://clientretentionsuccess.com/uploads/1/3/0/2/130289763/2435982.pdf
    • http://landclearingbaytown.com/uploads/1/3/1/1/131163854/e68ae.pdf
    • http://mariadopao.com/uploads/1/3/0/7/130739860/timufefunifap-pubezoturabu-zoxeposegije-tijerixexumoxiv.pdf
    • http://ketowithgrace.com/uploads/1/3/1/3/131383934/bf1636.pdf
    • http://vansrv7a.com/uploads/1/3/0/8/130814241/4970291311ff083.pdf
    • http://villasdiamante.com.mx/uploads/1/3/0/4/130489248/5c575.pdf
    • http://bangladeshinvestbankbd.org/uploads/1/3/0/8/130814390/5964250.pdf
    • http://birdsofpreytexas.org/uploads/1/3/0/4/130483527/7854e373a5f4a.pdf
    • http://study.leoinnovationlab.com/uploads/1/3/0/7/130739021/kawafopune.pdf
    • http://admintern.com/uploads/1/3/0/6/130639797/62a3629180.pdf
    • http://honeyloverfriend.com/uploads/1/3/0/8/130874314/d02219acf504d.pdf
    • http://bigislandeventrentals.com/uploads/1/3/0/3/130323298/756002.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_off00007916.bin
c8513e5f8af00223ca602677d3cdc5ed8b58210ca0fc58e79299ce7eb8884960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7916 8280 bytes

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