PDF malware analysis — malicious · 337c1b15e28c4ccc

MALICIOUS

PDF

47.9 KB Created: 2021-05-11 06:35:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31

MD5: 113816002d7abdb2b922fb55ee52642d SHA-1: 5ba731235157ca5a95f94b7a080c6a8653ef60b3 SHA-256: 337c1b15e28c4ccc7257a97f3776aa64110746a398be3435d197d4b56ca399e3

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF files related to game hacks and free currency. One prominent URL, 'https://netcdn.xyz/app/431946152/is-there-a-way-to-get-free-robux-game-hack', is identified as a malicious redirector. The document body, though partially corrupted, also contains this URL and other links, suggesting a lure to potentially malicious content. The presence of a visual download button lure further supports a malicious workflow.

Machine Learning

Nyx PDF Classifier malicious score 0.9013

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 https://netcdn.xyz/app/431946152/is-there-a-way-to-get-free-robux-game-hack In PDF document text
- https://dribledasortegaucho.com.br/uploads/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/daily-spin_GM406889139.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/roblox-people-girl_GM431946152.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
- https://dribledasortegaucho.com.br/uploads/files/daily-free-spin-coin-master-link_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_off00004fbd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4FBD	26576 bytes
SHA-256: `34723af09665156728fe523b197736e186f589a07455926823cb69a5058d8b01`
`font_01_sfnt_off00008d14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D14	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off000096ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x96FF	18892 bytes
SHA-256: `e2ca2daecae93cd27ff1d51a172310d30bada5b25af9f9600d3ad780ee102f76`

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