PDF malware analysis — malicious · 8481ba68f2c85e06

MALICIOUS

PDF

34.0 KB Created: 2021-06-25 05:19:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 1d13c97748c051a7c7d8696ac95c66e9 SHA-1: 440ce78af07425eed817266fcde1500d93dd08af SHA-256: 8481ba68f2c85e0647f40edcedf03b43b24867252e2f74ece53d6b3483c012cc

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a redirector link that lures users to a 'free generator / game hack' website. The document body also contains the same URL, reinforcing the lure. While no scripts were extracted, the presence of a malicious redirector and the nature of the lure suggest an attempt to deliver a second-stage payload or phish for credentials.

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.co/app/406889139/free-spin-and-win-coin-master-game-hack In PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/cheat-codes-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-game-called-roblox_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-robux-pin-codes-2021_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-roblox-sweatshirt_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/roblox-free-robux-pins_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-roblox-toy-codes-not-used_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
`font_00_sfnt_off0000304e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x304E	22060 bytes
SHA-256: `8e0f6e47a645fd8e653e40601cb82fa3e08ebde4fccebc745a82d6a6e81673fc`
`font_01_sfnt_off00006134.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6134	18548 bytes
SHA-256: `b9db317eaf3db36a6e52b5dfe98c7fc2c97b5ad438dfc0dcb37cbdfbcff15dbf`

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