Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e66a00b6ea5213…

MALICIOUS

PDF

40.4 KB Created: 2020-03-21 18:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0943b7ea47fc38872e8a60f6093c3614 SHA-1: 7f994b335d8dc6b7f4e3b4eab791d6d7ef940ca0 SHA-256: 12e66a00b6ea5213ddb794f60f4c514fbb8d47a69d1b4ca3f2df5c30ba621b1c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which follow a pattern suggesting SEO spam or a link farm. The ML classifier strongly indicated maliciousness, and the PDF structure itself is flagged for containing a mass of external links. While no scripts were directly extracted, the embedded URLs are the primary indicators of malicious intent, likely serving as a gateway to further malicious content or phishing pages.

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://millennialrealtysolutions.com/uploads/1/3/0/4/130476378/130476378.html#notas+de+guitarra+acustica+pdf
    • http://soblowedapparel.com/uploads/1/3/0/6/130639246/weroraxutuperitiwux.pdf
    • http://blakeleysmobilemechanic.com/uploads/1/3/0/5/130543667/5422268.pdf
    • http://ournd.net/uploads/1/3/0/7/130775366/6234734.pdf
    • http://smartbuyerstech.com/uploads/1/3/0/6/130604805/8267360.pdf
    • http://mobadanceacademyus.com/uploads/1/3/0/7/130738667/weraboluxiketunutaw.pdf
    • http://oc3.co.uk/uploads/1/3/0/4/130488198/ripezawukikep_pejiz.pdf
    • http://incometaxesmadeeasy.com/uploads/1/3/0/5/130539457/zizokimovebobako.pdf
    • http://witenterprises.net/uploads/1/3/0/7/130775245/3933666.pdf
    • http://newcanula.com/uploads/1/3/0/4/130435839/2641593.pdf
    • http://metakinkpodcast.com/uploads/1/3/0/6/130620673/50dd37e1dfcb29.pdf
    • http://blog.lawncarenewburgh.com/uploads/1/3/0/7/130740340/fugobe_zejazafuji.pdf
    • http://celebrateinvitations.org/uploads/1/3/0/6/130621317/wutatuzoxeluruzom.pdf
    • http://bryanperrydev.com/uploads/1/3/0/5/130588445/kanorosirun.pdf
    • http://jhp.photography/uploads/1/3/0/5/130551604/misami_mitujizimuwiv.pdf
    • http://barbattu.com/uploads/1/3/0/6/130604950/gupowopufuw-liwodeguse-dufipopovugedu.pdf
    • http://aifby.com/uploads/1/3/0/5/130589150/f8b169cb.pdf
    • http://srv1.bkyfinancial.com/uploads/1/3/0/2/130271073/9e9e60a.pdf
    • http://clintonprep.org/uploads/1/3/0/7/130775977/8895809.pdf
    • http://www.kimbuhlitravels.com/uploads/1/3/0/7/130740118/dudavuxob.pdf
    • http://www.cinnfulllashes.com/uploads/1/3/1/1/131163976/4965807.pdf
    • http://starfishmakeupstudio.net/uploads/1/3/0/8/130874165/muzunibunu-tepegalozap-golux-monakabo.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_off00007135.bin
aaf0e45ada66ddf316d702e4b31c187f9ec97f8f69e77d93b17aa5c34f7f2dc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7135 9156 bytes

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