Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc30afe749fabe13…

MALICIOUS

PDF

48.3 KB Created: 2020-04-23 04:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f08c9d9b1aa4ca2c0e3faaf4c68efc05 SHA-1: 7ba7bff457d45f1a954e0de1ba6114878d48f2f8 SHA-256: bc30afe749fabe1343c422018ae25d8331898c030e687dd121284e31f99bcf13
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The primary lure appears to be an "Informant movie summary" which redirects to a suspicious URL. The ML classifier strongly indicated maliciousness, and the PDF structure with numerous external links supports a malicious intent, likely for phishing or malware distribution.

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://federacioncolombia.com/uploads/1/3/0/6/130620207/130620207.html#informant+movie+summary
    • http://maryleezawadski.com/uploads/1/3/1/4/131453807/0ac62.pdf
    • http://nnoutt.com/uploads/1/3/1/4/131406062/6666325.pdf
    • http://cosmedics.gr/uploads/1/3/0/6/130621328/fa6f3d71ab086a2.pdf
    • http://simoneles.com/uploads/1/3/1/6/131637046/zitisazojulexese.pdf
    • http://pchrestore.com/uploads/1/3/0/4/130477064/dudoselipapi.pdf
    • http://arizonacustomgraphics.com/uploads/1/3/0/5/130590469/6111808.pdf
    • http://valleyviewacrespnw.com/uploads/1/3/0/2/130289211/pesodir.pdf
    • http://renaissance-nutrition.com/uploads/1/3/0/8/130874307/xuxizevozixinetabo.pdf
    • http://journeylaurel.net/uploads/1/3/1/4/131438804/suzelefavepu_duroz_mogugojafe.pdf
    • http://islandharvestco.com/uploads/1/3/0/6/130639037/ba0669fc591.pdf
    • http://oregonrevivalcenter.com/uploads/1/3/0/7/130775821/6293132.pdf
    • http://saoluistelecom.com/uploads/1/3/0/6/130639763/ebe68fbd3e5.pdf
    • http://sharkteamone.com/uploads/1/3/1/0/131071021/kuzexaxerozufapor.pdf
    • http://not-heedles.com/uploads/1/3/0/7/130775033/verekabepawenu.pdf
    • http://arizonacustomgraphics.com/uploads/1/3/0/5/130590469/6111808
    • 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_off000092bc.bin
b8c6c9375940c83a555bb07188b6441668749149d7ac442533b797f496cdf0f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92BC 9052 bytes

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