PDF malware analysis — malicious · 3a8cf2b3970404a7

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 19:29:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31

MD5: beeff11c032e491f902bc35997ff3a30 SHA-1: c3f75d216a4b3867a18e446d380d4db63430ff28 SHA-256: 3a8cf2b3970404a7ca07eb8bf88125871007316590fa66e90c129753b9f871a6

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to trick users into clicking embedded links. The primary link, http://netcdn.tw/app/406889139/coin-master-links-that-don-t-expire-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a workflow designed to lead the user to potentially malicious content or further downloads, aligning with a phishing or social engineering attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-links-that-don-t-expire-game-hack In PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/roblox-bot-hack_GM431946152.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/get-free-roblox-2021_GM431946152.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/denis-free-admin-town-roblox_GM431946152.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/hack-assassin-roblox_GM431946152.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/coin-master-hack-mod_GM406889139.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/roblox-free-catalog-script_GM431946152.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
- http://www.area-tlc.com/public/ckfinder/userfiles/files/hacks-para-roblox-online_GM431946152.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_002_off00003234.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3234	22320 bytes
SHA-256: `5d21b153387ba6ebf5740fbeb8d7bcea6fe3b394fa036ae7aa6c622c6d34118e`
`font_01_sfnt_off00006384.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6384	18724 bytes
SHA-256: `0bc74d52f75a1104db5e4695d05e5addd24de774456fb5db8c3829ae8d2508b3`

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