PDF malware analysis — malicious · f70f5714890b20f0

MALICIOUS

PDF

50.6 KB Created: 2021-06-07 18:03:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: d9b28d47628c3677c4c8fd79d98673bf SHA-1: 04cef9795a0b81cef10509a1f69c8f34c431e715 SHA-256: f70f5714890b20f0092aeb9366e1ae3031666f9d55b5805e3453d0a8bdf44b9b

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to malicious redirectors, masquerading as game hacks and cheats for popular games like Roblox and Coin Master. The document also impersonates the Apple brand to lure users into clicking these links, which likely leads to credential phishing or the download of further malicious content. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to deceive users.

Machine Learning

Nyx PDF Classifier malicious score 0.9779

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.
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/roblox-free-items-event-game-hack.
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/roblox-free-items-event-game-hack In PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/free-links-coin-master_GM406889139.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/minecraft-java-account-free_GM479516143.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/roblox-free-accessories_GM431946152.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/coinmaster-free-cards_GM406889139.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
- https://vireco-online.com/ckfinder/userfiles/files/how-to-get-free-roblox-items_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_004_off00005126.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5126	30308 bytes
SHA-256: `f29f001dea642284a1fa25afb1703c779637d93879b58a841de78e1688b50519`
`font_01_sfnt_off000095fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95FB	5596 bytes
SHA-256: `9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5`
`font_02_sfnt_off0000a2a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA2A3	18428 bytes
SHA-256: `365541aea2352134c59a301a0f92e2450dff65a200c982511c7141babf15791e`

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