PDF malware analysis — malicious · 8eff3e092a535c36

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 08:29:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12

MD5: 4ca0cf9773bf128f1113b8a457c606da SHA-1: 3e68a24a5e3926c6ed1905df8dae41a0bb0c65be SHA-256: 8eff3e092a535c368f0d44e601339d6dc4bb18cc3fb9eb0aa1ecfc7a741c22cb

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one that directly leads to a known malicious redirector infrastructure. The document body and embedded links suggest a lure for game-related cheats or currency, a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection and potential exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/robuxmatchcom-free-robux-game-hack In PDF document text
- https://www.ucc-today.com/uploads/files/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/wurst-mc_GM479516143.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/pokemon-go-free-xp_GM1094591345.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/free-coins_GM406889139.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/simplysarc_GM479516143.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/roblox-hack-robux-and-tix-download-no-survey_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/minecraft-windows-free_GM479516143.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/free-robux-group_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/free-robux-promo-codes-2021_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_off00005023.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5023	24932 bytes
SHA-256: `6671bd097ccfbf9d390b32ea1543d82350b3b7c31cfee460de4e11f7614e8285`
`font_01_sfnt_off00008984.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8984	18772 bytes
SHA-256: `f6f31f9c0c016e7c7e915a25ed0379b1b52a2107f0cf95fcb0a5807dd5e71c24`

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