PDF malware analysis — malicious · f5b7740f5bcbf3c1

MALICIOUS

PDF

38.3 KB Created: 2021-07-05 18:14:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 13ff317501159533cae57c2d9c6a5cd2 SHA-1: e5aefa8212a7c6cfb18e363dd5fc7e7508349b77 SHA-256: f5b7740f5bcbf3c1aeca518894fa466799f1f7edf65e6f0a52f697f598e3afff

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links, including one to 'netcdn.tw', which is flagged as a redirector for game hacks. The document body and heuristics indicate a lure for free spins and game hacks, suggesting a phishing or scam campaign. While no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9899

Heuristics 5

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.
PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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/406889139/links-to-get-free-spins-on-coin-master-game-hack PDF link annotation
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/www-roblox-com-robux-free-download-no-surveys_GM431946152.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/how-to-get-free-robux-no-generator-2021_GM431946152.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/hacks-for-free-robux-on-roblox-no-human-vertify_GM431946152.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/bloxfree-roblox-hack_GM431946152.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/unlock-my-games-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/roblox-snow-shovelling-simulator-hack_GM431946152.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
- https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/hack-coin-master-apk-2021_GM406889139.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
`font_00_sfnt_off00003578.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3578	22884 bytes
SHA-256: `0f8ce1c592d98cb4e0e8b6d23fe73f05759b6d9673f52b08268e19432b737bda`
`font_01_sfnt_off000068cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x68CC	2896 bytes
SHA-256: `c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd`
`font_02_sfnt_off000072b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72B1	18344 bytes
SHA-256: `1dde3a634a35d4e9c8cc8702715575f7350bc413b734fd9f7bac35511dc11ac3`

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