Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef06d9d50c9e7dec…

MALICIOUS

PDF

30.9 KB Created: 2021-05-20 18:17:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a03f14ad671dab7b15eda219cc38fa81 SHA-1: de3eb43f41a982b72be4ae6d8d55952bce4a524b SHA-256: ef06d9d50c9e7dec4b258dab3df38b845d9d86d51c5cc0645577352661b7d192
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links that redirect to malicious infrastructure, specifically targeting users with lures related to game hacks and generators. The primary redirector URL is https://netcdn.xyz/app/431946152/roblox-free-hair-boy-game-hack, which is designed to entice users into clicking further links. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9785

Heuristics 3

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • 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://netcdn.xyz/app/431946152/roblox-free-hair-boy-game-hack In PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003483.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3483 24468 bytes
SHA-256: c1d3c74cf4302109162498e7d5536b48827668cd703ac166d14a23407ba6efc0

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