PDF malware analysis — malicious · ad4b346c86738c94

MALICIOUS

PDF

50.6 KB Created: 2021-06-02 22:24:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 658e30cd4d56d155f4aaf5f7643f5d63 SHA-1: 88b5d1605ae5686b718fb4702fba9c21aa591269 SHA-256: ad4b346c86738c941f3ba7b58dd13a8195c87dad3b7f06aae3f40c015f8e4ea9

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, all pointing towards a lure for free game hacks or generators. The document body, though partially garbled, contains text related to 'Snapes Free Download Roblox' and a URL that aligns with the heuristic findings. The primary malicious activity observed is the redirection to potentially harmful websites through embedded links.

Machine Learning

Nyx PDF Classifier malicious score 0.9779

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/snapes-free-download-roblox-game-hack In PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/rbx-land-free-robux_GM431946152.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/roblox-free-shirt-templates-download_GM431946152.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/coin-master-villages_GM406889139.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/tiktok-free-crunchyroll_GM835599320.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/pubg-uc-load_GM1330123889.pdfIn PDF document text
- http://www.avorganic.org/uploaded_files/userfiles/files/do-robux-generators-work_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_004_off0000547e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x547E	25484 bytes
SHA-256: `14e6af5cab65ae57c5ee2c38ad12a4a32d5183d63067b4dc503682520ead1190`
`font_01_sfnt_off00008f97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F97	7336 bytes
SHA-256: `ff031f4d9839d8bb59c904b93876e4f58da413e9417a9fc59db7fc3d052023ea`
`font_02_sfnt_off0000a144.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA144	18860 bytes
SHA-256: `44ff67ac7fb260fb633636a96743203717a365d87128daaca3bdf0fdb6ba3940`

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