PDF malware analysis — malicious · c52e083b6f44276c

MALICIOUS

PDF

45.2 KB Created: 2021-05-10 23:45:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 8c284e460263a8eb1e6e5e597ac8a07b SHA-1: 7d67ffa0e52ef75b31c042d4332a6db9a4a8a504 SHA-256: c52e083b6f44276c18d73bb2262cae408c541ef8bd22fde3855cf2d0dcabd760

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, leading to a 'free generator / game hack' lure. The document body and embedded links suggest a social engineering attempt to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector workflow.

Machine Learning

Nyx PDF Classifier malicious score 0.9621

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/free-spins-coin-master-without-survey-game-hack In PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/roblox-re_GM431946152.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/daily-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/rewardex-robux_GM431946152.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/minecraft-games-to-play-for-free_GM479516143.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_off00004a9d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A9D	24416 bytes
SHA-256: `45bfd54f85b9c787433f55395f84917a04479b03aa59b4e196f4fe5c5dd36d89`
`font_01_sfnt_off000082ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x82CE	2920 bytes
SHA-256: `601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7`
`font_02_sfnt_off00008ce8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CE8	18684 bytes
SHA-256: `ad7fa04790fc34b76c8e1b16c403c61c32ceaee032d5a8afb0071baf0a254118`

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