PDF malware analysis — malicious · 50d9bf54daa93e1f

MALICIOUS

PDF

45.9 KB Created: 2021-06-08 11:23:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 7a0106b531dfd3c7129e3bba883fe6fc SHA-1: 6508ac3911b0ebddb1332abe31464e6d53703dca SHA-256: 50d9bf54daa93e1fc8f5ce457fc7974ff8ddcd5137cc5a465c326dd2daeec36c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically promoting game hacks and free Robux. The primary lure directs users to a URL associated with a game hack download, which is a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious sites, likely for further payload delivery or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

Heuristics 4

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.
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.tw/app/431946152/cipher-roblox-hack-download-game-hack In PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/get-free-robux-now_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/free-bacon-outfit-roblox_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/free-items-on-roblox-pastebin_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/free-roblox-tickets-cheat_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/roblox-games-that-give-u-free-robux_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/roblox-one-piece-millenium-hacks_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/robux-free-hack-with-no-human-verification_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/roblox-speed-hack_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/how-to-hack-force-field-in-cheart-engine-on-roblox_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/fashion-frenzy-roblox-play-for-free_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/cheat-codes-for-zoo-tycoon-roblox_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/roblox-wall-hack-2021_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/free-items-from-roblox_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/how-to-get-a-hacked-roblox-account_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/bloxland-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/robux-free-2021-com_GM431946152.pdfIn PDF document text
- https://digitalknowledge.pl/wp-content/uploads/fsqm-files/how-to-get-synapse-x-roblox-for-free_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_004_off00005389.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5389	25800 bytes
SHA-256: `da9049220021630f4e3424b491330c5dd63104a480c848d1008ddd4f4071a942`
`font_01_sfnt_off00008e41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E41	19152 bytes
SHA-256: `0bf60ede3685a0a97d1db178ce9998b6bdb4bf91b15c2a57e90d002c944ea76d`

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