PDF malware analysis — malicious · 16a884756c9d297d

MALICIOUS

PDF

35.5 KB Created: 2021-07-02 03:35:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 2e5ea915f23ac732643f99d731eb1150 SHA-1: 2e7893faed38e942cebabc49a05bdb56e77fa612 SHA-256: 16a884756c9d297d2ecef68f2a0da9e6096093600bd850c459a1b49fd319f9a1

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links and text that explicitly promise 'Free Robux No Human Verify' and 'game hack' generators. These links point to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for free in-game currency or cheats, which is a common social engineering tactic to drive users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-no-human-verify-game-hack In PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/free-tiktok-followers_GM835599320.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-hacker-club_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/oprewards-com-robux_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/minecraft-app-free-download_GM479516143.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-download-hack_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/roblox-free-vip-server_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/robux-download_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/free-2021-robux_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/how-to-host-a-minecraft-server-for-free_GM479516143.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
`font_00_sfnt_off000032aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x32AA	22536 bytes
SHA-256: `9d32ec3bfc7a82ac14e2e2d2ae1d44c354fa8954267ebe9a48eb91b8f353b6fe`
`font_01_sfnt_off000064df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64DF	19412 bytes
SHA-256: `54327e069fe8aee8a1f9c86c3e3ab55b96abeaa3698aab69d5a1c80f08638ce8`

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