PDF malware analysis — malicious · 3a757684e617ba33

MALICIOUS

PDF

45.4 KB Created: 2021-05-10 19:41:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: cdd70d4352335837db672801d6c78345 SHA-1: 1d0680431ee79032150560b80f8522b9877ba7b4 SHA-256: 3a757684e617ba333d90adb4e923b7c9f9ec9478ecd05c0fd69b6c2ce9732cd6

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game cheats and free spins, a common lure for phishing or malware distribution. The 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_SEO_LINK_FARM' heuristics indicate a deliberate attempt to create a link farm for SEO manipulation or to direct users to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a workflow designed to redirect users to external sites, which could host further malicious content or exploit kits.

Machine Learning

Nyx PDF Classifier malicious score 0.9507

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 https://netcdn.xyz/app/406889139/coin-master-cheats-for-free-spins-game-hack PDF link annotation
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/claim-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/robux-offer-wall_GM431946152.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/buy-robux-free_GM431946152.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/what-is-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsalkhairaatternate.sch.id/__statics/gudangsoal/files/robuxlove-net-free-robux_GM431946152.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_off00004d22.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D22	25056 bytes
SHA-256: `c315e2803603afe9fa51bc872496e410f719125e70b5113ed2edc639cb2ed765`
`font_01_sfnt_off000085c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85C8	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00008fb3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8FB3	18052 bytes
SHA-256: `78e09613e9051ea2c05113a2cb3e2459165660dd7357248de65be6b789990433`

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