PDF malware analysis — malicious · 4100b288230c4abb

MALICIOUS

PDF

32.8 KB Created: 2021-07-19 16:00:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31

MD5: 9a3145bdb025aaf4dbdc51a715ec1546 SHA-1: c98532d58ad44e05e50cbbac6f1c3c88940cd37c SHA-256: 4100b288230c4abbf6f8afc7f10f01bec42ca15f05d6e4da667c7e93fa576428

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, that promise free game hacks and accounts. The document body and embedded links suggest a lure to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the presence of malicious redirector links and the overall lure strongly indicate a phishing or scam attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9900

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/479516143/free-minecraft-accounts-reddit-game-hack In PDF document text
- https://magistrinfo.ru/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
- https://magistrinfo.ru/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://magistrinfo.ru/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
- https://magistrinfo.ru/images/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
- https://magistrinfo.ru/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
- https://magistrinfo.ru/images/tiktok-fans-free_GM835599320.pdfIn PDF document text
- https://magistrinfo.ru/images/free-tiktok-likes_GM835599320.pdfIn PDF document text
- https://magistrinfo.ru/images/robux-com-free_GM431946152.pdfIn PDF document text
- https://magistrinfo.ru/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://magistrinfo.ru/images/how-to-get-free-robux-on-roblox_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_off00002ce1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2CE1	22464 bytes
SHA-256: `d4eef822a430bef1cf256b423eabbf8096576a1f57e07acd194830390cb7acf2`
`font_01_sfnt_off00005efc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EFC	18024 bytes
SHA-256: `8cc2f99dc924a15d52918b37ec4a77595277c9fc296e6ac0964170e61a15a16b`

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