PDF malware analysis — malicious · d081f21b5d31a744

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 10:50:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 838abbbfebafb717fb82468902f3b3b0 SHA-1: 7707df598873fc62d16d998cfc038052cefa3040 SHA-256: d081f21b5d31a744376ca3ca31095d091c73a8b94e4c196329ac6b371d2ddd29

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector, designed to lure users into clicking for game hacks or free currency. The document body and heuristics indicate a scam related to 'free Robux' and game generators. While no scripts were directly extracted, the PDF structure and embedded links suggest a phishing or scam attempt, likely delivered as an attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-for-kids-no-verification-game-hack In PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/dungeon-quest-hack-using-cheat-engine-roblox_GM431946152.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/broken-bones-roblox-hack-v3rmillion_GM431946152.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/roblox-hack-email_GM431946152.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/nonsense-roblox-cheat_GM431946152.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/pokemon-go-free-gyarados_GM1094591345.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/how-to-hack-another-player-on-roblox_GM431946152.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/roblox-free-prizes_GM431946152.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/roblox-robux-hack-generator-download_GM431946152.pdfIn PDF document text
- https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/league-of-roblox-hack_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_off00003150.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3150	22748 bytes
SHA-256: `8861715b99b238fd4a39a13e6e39f596eaafced9e519522a5abe2d59964c7b03`
`font_01_sfnt_off0000643a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x643A	19248 bytes
SHA-256: `cfee841a5dae106b2cf9b4cdd4f4599820923438d7b3e36504f4b087b21eb8e1`

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