Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e93fe0f5b3eeeec…

MALICIOUS

PDF

46.6 KB Created: 2020-04-15 03:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f5fb09b217bcff7ad9d61ea78953c183 SHA-1: da4fa517b78ee27e8f31b3ae26b8580ebbe249b9 SHA-256: 1e93fe0f5b3eeeec2c09ab232b7ed3cd0781655d0266bdb8bc1f3f0f8b73273e
94 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 hosted on newly registered domains and appear to be part of a link farm. The document body mentions 'Cloudformation nested stack templateurl', suggesting a lure to trick users into visiting malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is used for malicious redirection or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bespokeportugal.com/uploads/1/3/0/6/130620451/130620451.html#cloudformation+nested+stack+templateurl
    • http://civilbrewingcompany.com/uploads/1/3/0/5/130550698/2979906.pdf
    • http://southernforestshoney.com/uploads/1/3/1/3/131384368/rokanisokufapujo.pdf
    • http://jwlockhart.com/uploads/1/3/0/4/130435987/57dda76ac66a54.pdf
    • http://williamdilley.com/uploads/1/3/1/4/131409794/849059.pdf
    • http://jeffupp.net/uploads/1/3/1/3/131398477/mejugobeketu.pdf
    • http://depenharts.com/uploads/1/3/1/3/131384171/senejogegexaxameza.pdf
    • http://nickdent.com/uploads/1/3/0/9/130969477/5812926.pdf
    • http://adriannabeautyllc.com/uploads/1/3/1/4/131454435/add0a73cd.pdf
    • http://nickdent.com/uploads/1/3/0/9/1309
    • 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_off00008121.bin
c162126075042280d6732f81709e52e72b51deb53d4535024c88e149a48cdab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8121 9304 bytes
font_01_sfnt_off0000a494.bin
aa0570798aceaed3a14784aa7b7692c36ef93fa9c4c7caae50cf44d5f61f7b9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA494 2712 bytes

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