Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b5cbfdcc5c706e…

MALICIOUS

PDF

50.8 KB Created: 2020-10-30 19:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a0fd7f243466bd0619767411240c74c SHA-1: c32ab1b3187c409b976a2bb533511e4e8dfd5230 SHA-256: c0b5cbfdcc5c706e42ba0dc154a058fad4e5ad3f2351ae7e6a659157784b6ac6
94 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The embedded URL is likely intended to lure the user into downloading a second-stage payload or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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 https://gettraff.ru/aws?keyword=realm+defense+best+hero+3000
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/826152352fc16.pdf
    • https://jinaverew.weebly.com/uploads/1/3/4/2/134235607/sodokopopul.pdf
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/783f24d1.pdf
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/5b74d84467b9ad.pdf
    • https://nulosogitizibe.weebly.com/uploads/1/3/4/3/134317173/dunowigiru-kasuvolilipomuj.pdf
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/3898644.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3fcdceb8-fb7d-4425-b4fc-a7fb8137ccd5/22669354266.pdf
    • https://s3.amazonaws.com/subud/2668809516.pdf
    • https://uploads.strikinglycdn.com/files/cbcc3c3a-507a-4cf6-a035-9db15bba0e4f/business_statistics_for_contemporary_decision_making.pdf
    • https://s3.amazonaws.com/zasepo/dodge_challenger_wallpaper_4k_for_pc.pdf
    • https://uploads.strikinglycdn.com/files/89a535f3-d141-44f3-b2c7-80a99cf89307/63168441817.pdf
    • https://uploads.strikinglycdn.com/files/de36f8af-b240-4df2-9f14-5c5769869eeb/fekogaki.pdf
    • https://uploads.strikinglycdn.com/files/6ee370f4-d393-43ba-b5f5-e453162361fa/bekifej.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000850a.bin
0df912c2608816b8663a06f2eb3d3314aafbedb2de4da6da64cc6c9d80d26070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x850A 5600 bytes
font_01_sfnt_off000097e9.bin
06d823e3ebf4b6b3ac7b8b2ddffe787cb692634f7e08171cbe1e7f05dc7f62b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97E9 11648 bytes

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