PDF malware analysis — malicious · 492e78b2ea663580

MALICIOUS

PDF

43.0 KB Created: 2021-05-11 09:05:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 5a0c4e7db54caddad9bd6076f237a1cf SHA-1: 168fcd6145930c6054ae1dd56966b5eb21e7df45 SHA-256: 492e78b2ea663580273758e29b03f0576efb822c9965e4dabaec2eb0f7487bd4

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users to external sites, including a known malicious redirector. The document body and heuristics indicate a scam related to game hacks and free currency. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or scamming attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/406889139/collect-free-spins-for-coin-master-game-hack In PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/clean-master-hack-coins_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/minecraft-java-account-free_GM479516143.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_off00004dab.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4DAB	25460 bytes
SHA-256: `c88205f384ad2e2d88e99fc9888a2cc3a4bb2d433ee0a8a9a4429114dca2b5f3`
`font_01_sfnt_off0000870c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x870C	17960 bytes
SHA-256: `56908844ab102c912342fec259dbf5a97100868d5d877c05497f82053eb67f28`

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