PDF malware analysis — malicious · 804ae049e9a38faf

MALICIOUS

PDF

46.3 KB Created: 2021-05-17 20:04:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 9345d5b8f49eef345e9c44e797bc8a42 SHA-1: 99f2c950304f3c4cb53de1f32c32d73287198627 SHA-256: 804ae049e9a38faf41b133d918cd447a3a77e3aee86a8e8ca0e1d0fbe7e75e35

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.8696

Heuristics 5

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.
PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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/479516143/how-to-get-minecraft-bedrock-for-free-with-java-game-hack PDF link annotation
- https://www.mahabircreation.com/uploaded_files/userfiles/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/free-roblox-animations_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/game-toolbox_GM479516143.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/roblox-inappropriate_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/free-robux-cards_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/free-minecraft-mods-for-xbox-one_GM479516143.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_003_off00004e11.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4E11	24848 bytes
SHA-256: `ffa41e32ec99dc23ae9322165f7e63190931bad2df6cb3fe02cbb30e8f65ad43`
`font_01_sfnt_off0000865d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x865D	2856 bytes
SHA-256: `8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44`
`font_02_sfnt_off00009034.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9034	19080 bytes
SHA-256: `002987b75c35d71c6d5d20848391c929676045185f0534b5c79dddd252281abc`

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