PDF malware analysis — malicious · e7069f0198022bca

MALICIOUS

PDF

46.7 KB Created: 2021-05-17 21:23:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-07

MD5: af65f6aa148ca88696043dda2456f825 SHA-1: 8d059394dae05134fdc148b194c7a2a65d05803e SHA-256: e7069f0198022bca79a44a03b593fc722ca7229c3527339af4464e5183adb200

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on "free generator" or "game hack" content, redirecting to malicious infrastructure. The heuristic firings indicate the PDF is part of a link farm and uses known malicious redirectors. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a malicious workflow aimed at driving traffic to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

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/free-robux-place-game-hack In PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/roblox-free-items-2021_GM431946152.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/free-robux-easy_GM431946152.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/download-apps-for-robux_GM431946152.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
- https://www.opertus-me.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
- https://rblx.landIn 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_off00004cb2.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4CB2	25312 bytes
SHA-256: `e3bc773066388b0e026faf212ac8e038c05343ce569f1f3e91e16aab386dac81`
`font_01_sfnt_off00008731.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8731	3464 bytes
SHA-256: `8e24205afdd13dcdea98f8150ef77dee4030e0e50a7c748783d1b4598e034a20`
`font_02_sfnt_off00009366.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9366	18472 bytes
SHA-256: `a8315d3de564ce67f995c8887965c7d9f34366905f839248eafe88b792a59691`

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