PDF malware analysis — malicious · d821dec4cbf659cd

MALICIOUS

PDF

42.5 KB Created: 2021-06-03 11:12:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 7a8b31d06616982572c6d7579ea69e5d SHA-1: af88ff27f974ffdd7fca44123ea8f127d0c7a128 SHA-256: d821dec4cbf659cdf3f59dea12f13ac9c14c9232964fb172f26562343d02cbe7

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links, one of which, 'https://netcdn.online/app/406889139/free-spins-coin-master-game-hack', is identified as a malicious redirector. The document body and heuristics indicate a lure for game hacks or free spins, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a malicious intent to lead the user to a compromised site.

Machine Learning

Nyx PDF Classifier malicious score 0.9874

Heuristics 4

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.
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.online/app/406889139/free-spins-coin-master-game-hack In PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/pokemon-go-free-12k-eggs_GM1094591345.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/cm-spin-link_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/i-want-free-robux_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/tiktok-free-iphone_GM835599320.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-download-minecraft-hacks_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_004_off00004d3e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D3E	24476 bytes
SHA-256: `f097500381bce0d2779c494ba87c4ba442c17d06f231337efd2100b6359451c6`
`font_01_sfnt_off000084b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84B8	17884 bytes
SHA-256: `18816d8d761583b578c9833b8849e2eeaed27ef2f16a893d2032c58e3f8148b6`

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