Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebcae6da1c9e6d64…

MALICIOUS

PDF

39.7 KB Created: 2020-03-26 09:11:48 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ec64f3fb3f413d6827634ca0d62d27f1 SHA-1: c09874bfe2e69ce7160fef513bbf2c6ecbdc6239 SHA-256: ebcae6da1c9e6d64bace7052f019a1fb8dfc84d30fbb1b639c680159cf52642b
96 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 dynamically generated and point to seemingly unrelated domains. The document body contains a lure related to 'Yu gi oh gx gba gameshark codes' which directs the user to a specific URL, likely to a phishing or malware distribution site. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious purposes.

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://fairhavensurfcompan.com/uploads/1/3/0/6/130639973/130639973.html#yu+gi+oh+gx+gba+gameshark+codes
    • http://sjb-productions.com/uploads/1/3/0/7/130776344/kitikusilororamuzu.pdf
    • http://www.hongkongdanceproductionhk.com/uploads/1/3/0/5/130543006/mijubalanodi.pdf
    • http://splinteredmindapparel.com/uploads/1/3/0/5/130550794/400b95e28aa03af.pdf
    • http://equineartworks.com/uploads/1/3/0/7/130740212/236ee86d6ae31.pdf
    • http://www.tamparockbands.com/uploads/1/3/1/0/131070169/397081.pdf
    • http://nativelabjp.com/uploads/1/3/0/3/130312985/setuf_kodivusu.pdf
    • http://www.tompkinsmortgage.com/uploads/1/3/0/6/130621509/5957164.pdf
    • http://www.nurtureinspiredhair.org/uploads/1/3/0/8/130873971/gorovegeride_pebudo_nemigez_pefisirogi.pdf
    • http://mta-sts.mail.bobgirling.com/uploads/1/3/1/0/131069819/6545629.pdf
    • http://www.cornerhousecafe1609.com/uploads/1/3/1/0/131070407/gekafu-suvidizexuxafiv-jidos-vijufesel.pdf
    • http://wghscheer.com/uploads/1/3/0/8/130874019/judomitaloba.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_off000071d8.bin
2533be8c3956d90b60d5b59e1e7cc79dfe91ae493fefb46d23ffee3e77260c32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D8 8420 bytes

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