PDF malware analysis — malicious · 8fb933e8cdd4fca2

MALICIOUS

PDF

44.7 KB Created: 2021-05-30 04:10:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: dddd9c19d7fd390dcd6cb03273315170 SHA-1: 556c4ef53265bc70aefe1fa00f5d64d1561bce0d SHA-256: 8fb933e8cdd4fca21e64c9191c15f1e335cdc2289cd4ceb78d10900fdf9b4941

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game items to trick users into clicking malicious links. The document contains multiple embedded URLs pointing to redirectors and potentially malicious content, including a primary link to 'netcdn.xyz' which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness, supporting the observed redirection and lure tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9696

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.xyz/app/406889139/coin-master-free-spins-promo-code-game-hack In PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/bux-life-free-robux_GM431946152.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/free-minecraft-alts_GM479516143.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/coin-master-hacks_GM406889139.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/earn-free-robux_GM431946152.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/tiktok-views-free_GM835599320.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/tiktok-fans-free_GM835599320.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
- https://brsolutions.pl/wp-content/uploads/fsqm-files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004673.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4673	24532 bytes
SHA-256: `ba96f75a40a044ac13ade42f6abc8415e6f8240c57e2ccf095489446580b891c`
`font_01_sfnt_off00007d91.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D91	19628 bytes
SHA-256: `3a440b19849f04d0968a60fe021085c017d083e0c47c29f104560a9e2f7cc167`
`font_02_sfnt_off0000a389.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA389	3264 bytes
SHA-256: `e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088`

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