PDF malware analysis — malicious · 81422b5d12696268

MALICIOUS

PDF

35.0 KB Created: 2021-07-09 15:25:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31

MD5: 9addab6466ed2ebf74de7c9816e2c796 SHA-1: b5fb43af50ccc83a96b45071b23250429d091858 SHA-256: 81422b5d1269626804046ac72d9b135933ada00405cc1f604ee5c3fda8255029

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, including a known malicious redirector at http://netcdn.tw/app/479516143/minecraft-account-hacked-game-hack. The document body and embedded links leverage popular game lures like Minecraft and Coin Master to entice users. This suggests a phishing or scam campaign aimed at driving traffic to malicious infrastructure, potentially for credential harvesting or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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.tw/app/479516143/minecraft-account-hacked-game-hack In PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-robux-com_GM431946152.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/schto-roblox-free-shop-t-schirts_GM431946152.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/give-me-free-robux-com_GM431946152.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-daily-spins_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/lots-of-robux_GM431946152.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/www-free-roblox-games-com_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_off000031eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31EB	23076 bytes
SHA-256: `9336eede16b5d426a53ef4bc3bc414a91ed91ab7fa24f50a5a2b809b76624d61`
`font_01_sfnt_off000065b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65B8	18484 bytes
SHA-256: `5dd05c9cb448aa3988e40803526fd1466b4ff4df0b75d5f1fead4c9123013b57`

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