Malicious PDF — malware analysis report

Static analysis result for SHA-256 dadff34e310ac514…

MALICIOUS

PDF

37.6 KB Created: 2020-04-03 14:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 38b157efcfb649f5ff89b5242d4e4873 SHA-1: f3a798964777f4a8ee5066b342f5962440258bcd SHA-256: dadff34e310ac514d3c31bd89d5e6960f4c58ceb05dd75a833323894b9551083
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious content. The ML classifier strongly indicated maliciousness. The document body contains text related to a tour, likely a lure to disguise the malicious intent of the link farm.

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://witherlysgreenhouse.com/uploads/1/3/0/5/130551014/130551014.html#cenote+en+chichen+itza+tour+from+merida
    • http://xoxobessie.com/uploads/1/3/0/7/130776267/04278f61f0.pdf
    • http://strategywithapurpose.com/uploads/1/3/0/5/130544539/12d28c4510c.pdf
    • http://werollsuccess.com/uploads/1/3/0/7/130739964/8a4734271ee.pdf
    • http://terbildraems.com/uploads/1/3/0/9/130969340/vekuduwebewedon.pdf
    • http://mobile-al-implants.com/uploads/1/3/0/5/130544703/nowiwijowaji-tirofujalax-bazoduvuwis.pdf
    • http://usae-shop.com/uploads/1/3/0/5/130588407/9143669.pdf
    • http://desiredevents.net/uploads/1/3/0/4/130490036/wakiz.pdf
    • http://my-pet-blog.com/uploads/1/3/0/2/130272332/litudisuzuma.pdf
    • http://staklo-matulji.com/uploads/1/3/0/4/130436020/wixilifuki-munojonagiv-kofoderijuvofo-jawipipati.pdf
    • http://talentexpress.solutions/uploads/1/3/0/6/130622061/lozogarakutilozor.pdf
    • http://familycleaningservices.org/uploads/1/3/0/5/130589033/maferenuxigap.pdf
    • http://boldnbeautifulclothing.com/uploads/1/3/0/8/130874287/zoleje.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_off000067ca.bin
79f7cb230c55f7f3971be8a1749601b2fb20da3e9a3679af596949ed3a32629c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67CA 8804 bytes

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