PDF malware analysis — malicious · 4aacd05509d87ca8

MALICIOUS

PDF

34.9 KB Created: 2021-06-30 20:10:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: c39fe2211551030ed45ee2f58655b30f SHA-1: b84fe102070df0cb9e09d1bd36d0949bb1876f72 SHA-256: 4aacd05509d87ca890320dc8af7cee15c5d5a21571f4fad8b89269babcffbe6a

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 0.9980

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 http://netcdn.co/app/431946152/roblox-hack-generator-game-hack PDF link annotation
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-robux-no-download_GM431946152.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/instant-robux_GM431946152.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/roblox-free-item-codes_GM431946152.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/coin-master-free-spin-link-today-download_GM406889139.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_off0000325c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x325C	22344 bytes
SHA-256: `6efd08c09d00bf98b82022cdaa407228ec04fd53aa9d35edb3baccdc2e09af56`
`font_01_sfnt_off00006426.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6426	18760 bytes
SHA-256: `b79899937f6f59d67c0cc016ae9e295c0b2eeda93cfd6b0750b290eebb9c7341`

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