PDF malware analysis — malicious · 554848dedbf7a56a

MALICIOUS

PDF

46.1 KB Created: 2021-05-19 23:34:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 6f7feb7beb1db874f501a317db849eef SHA-1: fe1e210ea6e4cfb37767c1593bf4915137a7909f SHA-256: 554848dedbf7a56a6b6cb02b559067ddf0b5d347ebbe94390d573f149a09b980

260 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links designed to lure users to external sites offering game hacks and in-game currency, impersonating brands like Microsoft. The primary link, https://netcdn.xyz/app/431946152/roblox-premium-free-game-hack, is identified as a malicious redirector. The document body, though partially corrupted, also contains embedded URLs pointing to similar scam content. The overall pattern suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 6

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.
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/roblox-premium-free-game-hack.
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/roblox-premium-free-game-hack In PDF document text
- https://aits.co.id/ckfinder/userfiles/files/coin-master-free-download-app_GM406889139.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/wurst-client-download_GM479516143.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/free-robux-stream_GM431946152.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/free-robux-for-free_GM431946152.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://aits.co.id/ckfinder/userfiles/files/free-spins-coin-master-app_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
`stream_003_off00004c73.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C73	29832 bytes
SHA-256: `11401a63a17b5421a464611d5c5f130d70a6ed75c868ef0076c48222d21c4637`
`font_01_sfnt_off00009184.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9184	18620 bytes
SHA-256: `29b072d58d5b3a55b665a3fffae90f40690866f16f9b518bc51084b043f759b6`

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