PDF malware analysis — malicious · b71355efa59e85db

MALICIOUS

PDF

43.0 KB Created: 2021-05-19 19:00:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 0227fa783bd06ab8d1c1420cf1e42984 SHA-1: bcb434a96b8bc3f24dc63b3ab7a52a1af045369c SHA-256: b71355efa59e85db33b525ca2fe29f1579a249da95c55f41f902323c4e7058d6

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting free game currency or hacks. The document body and heuristics indicate a lure designed to trick users into clicking these links, which likely leads to further malicious content or downloads. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirection workflow.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/431946152/can-i-get-robux-for-free-game-hack In PDF document text
- http://www.oden.vn/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- http://www.oden.vn/upload/files/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
- http://www.oden.vn/upload/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
- http://www.oden.vn/upload/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
- http://www.oden.vn/upload/files/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
- http://www.oden.vn/upload/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
- http://www.oden.vn/upload/files/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
- http://www.oden.vn/upload/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
- http://www.oden.vn/upload/files/coin-master-hack-root_GM406889139.pdfIn PDF document text
- http://www.oden.vn/upload/files/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
- http://www.oden.vn/upload/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
- http://www.oden.vn/upload/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
- http://www.oden.vn/upload/files/blox-fun-info_GM431946152.pdfIn PDF document text
- http://www.oden.vn/upload/files/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
- http://www.oden.vn/upload/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- http://www.oden.vn/upload/files/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
- http://www.oden.vn/upload/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
- http://www.oden.vn/upload/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://www.oden.vn/upload/files/get-free-robux_GM431946152.pdfIn PDF document text
- http://www.oden.vn/upload/files/free-robux-scams_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
`font_00_sfnt_off00004893.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4893	25996 bytes
SHA-256: `8944214ac861ce608cb5089f421f18f337e22336aaeb8c81f44bdeb78dfd50a5`
`font_01_sfnt_off0000856c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x856C	18344 bytes
SHA-256: `56a64ad9af2fab004080c55c49ec35472f3c2134e95e40197be892b268dd39d5`

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