PDF malware analysis — malicious · 06ff7b114b52e331

MALICIOUS

PDF

45.6 KB Created: 2021-05-15 12:02:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: acd1e02b4f103f67221e429728925707 SHA-1: 6d69b4441f8587860eeba87874b81f9aff4e528f SHA-256: 06ff7b114b52e3314b8348e10d7e71c6a3410f711c3798122dc93679fc4cedb5

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs lures related to free Robux and game hacks, directing users to malicious websites. The document contains numerous links to external PDF files, many of which are SEO-optimized and likely serve as part of a link farm or redirect chain. The primary malicious redirector identified is https://netcdn.xyz/app/431946152/actual-free-robux-game-hack, which is associated with a critical heuristic firing for malicious redirector infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

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.
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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/actual-free-robux-game-hack In PDF document text
- https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
- http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
- https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
- https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/op-rewards-robux_GM431946152.pdfIn PDF document text
- http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/robux-free-robux_GM431946152.pdfIn PDF document text
- http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
- http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
- https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/minecraft-pe-apk_GM479516143.pdfIn PDF document text
- http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-spins_GM406889139.pdfIn PDF document text
- http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
- http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-apk-mod_GM406889139.pdfIn PDF document text
- https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/robux-no-verification_GM431946152.pdfIn PDF document text
- http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004c32.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C32	30844 bytes
SHA-256: `762f6899bf2af165b66d200fb2a5fda0d8011114a1b959c88df86463de2c6f92`
`font_01_sfnt_off00008f95.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F95	18420 bytes
SHA-256: `37b67a04c59087902b42b65f26bec20808041b5185ddbc4d4c9e15973e68d0ef`

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