PDF malware analysis — malicious · 5896d43bb1ae26c7

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 08:51:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: e96abed1bf16c1559e768757897e8ad6 SHA-1: b5e283f74ce1977e8d9ffadad9762524277801ed SHA-256: 5896d43bb1ae26c795fb00a3a7184acf0347322bef859bb54647673952baedc8

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to a known malicious redirector at http://netcdn.tw/app/406889139/coin-master-hack-apk-facebook-login-game-hack. The document body and heuristics indicate a lure for game hacks and generators, suggesting a phishing or scam attempt. The presence of many external PDF links also points to a link farm or SEO manipulation tactic to distribute malicious content.

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/406889139/coin-master-hack-apk-facebook-login-game-hack In PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/roblox-free-items-that-now-cost-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/roblox-army-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/level-7-lua-executor-free-hack-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/minecraft-free-install_GM479516143.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-minecraft-hosting_GM479516143.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/hacking-robloxs-account_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_off000032e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x32E9	23004 bytes
SHA-256: `4420e6c0961f1e0bffacc8caf0da6d5c41ddb5f7463cbd6bf167bd4f4e8ed6fa`
`font_01_sfnt_off00006696.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6696	18504 bytes
SHA-256: `f93699cca819ed26e1c568ad4486e6c3795ff68a76fc7fb57fa9b200e60d6c9e`

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