PDF malware analysis — malicious · c24bcb363bbfdf9c

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 14:06:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 3adacff82b470841e9abe5e3ed0ccbc2 SHA-1: 992d545b7b2c3efd7e7c8ee93ffb3a099dd8434e SHA-256: c24bcb363bbfdf9cccc3e1e01dbc268b1f282da78ddd9739123c583a539e9edb

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and currency to entice users to click on links. The primary link directs to a known malicious redirector, http://netcdn.tw/app/431946152/cute-free-hair-on-roblox-game-hack, which likely serves as a gateway to further malicious content. The document also contains a large number of links to SEO-optimized PDF files, suggesting an attempt to manipulate search engine results for malicious purposes.

Machine Learning

Nyx PDF Classifier malicious score 0.9983

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/431946152/cute-free-hair-on-roblox-game-hack In PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-long-hair-roblox_GM431946152.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/pokemon-go-free-or-james_GM1094591345.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/how-to-get-music-boi-on-roblox-hack_GM431946152.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/robux-link_GM431946152.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/how-to-make-your-game-in-roblox-hack-proof_GM431946152.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/robux-generator-2021_GM431946152.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-robux-codes-live-stream-november-22-2021_GM431946152.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/supreme-shirt-roblox-free_GM431946152.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/roblox-lumber-tycoon-2-cheats-pc_GM431946152.pdfIn PDF document text
- https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/games-that-give-you-free-robux_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_off0000312b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x312B	22020 bytes
SHA-256: `3ee91b78a3e99fab192eef600993320d246a8e2c3454c5c3262ec08f32375d89`
`font_01_sfnt_off0000618e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x618E	19012 bytes
SHA-256: `7f39dcfd0d6ad0566306e41e142fba4867ac24162cfe9690926b2c82680c74b8`

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