PDF malware analysis — malicious · 3cb396da1b9d5e84

MALICIOUS

PDF

38.0 KB Created: 2021-05-10 15:10:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24

MD5: c6b62abc555a347b68211eef503e3063 SHA-1: c827ba0315027e0508ecbfa3cadcec9769122667 SHA-256: 3cb396da1b9d5e84d6ca267656b86b051ac8436b9c255712f2ef4f1b4cf69edc

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The document body and heuristics indicate a lure designed to trick users into clicking these links, likely leading to further malware downloads or phishing attempts. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9930

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.xyz/app/406889139/hack-coin-master-using-cheat-engine-game-hack In PDF document text
- http://jdlogistic.cz/images/free-robux-2021_GM431946152.pdfIn PDF document text
- http://jdlogistic.cz/images/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
- http://jdlogistic.cz/images/free-robux-gen_GM431946152.pdfIn PDF document text
- http://jdlogistic.cz/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
- http://jdlogistic.cz/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://jdlogistic.cz/images/coin-master-village-4_GM406889139.pdfIn PDF document text
- http://jdlogistic.cz/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- http://jdlogistic.cz/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://jdlogistic.cz/images/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
- http://jdlogistic.cz/images/roblox-com-redeem_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_off00003c6d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3C6D	23652 bytes
SHA-256: `2f6cc08de5fbb13b216dd05930a5a267afd25c82f553441ccd33a723159e8c28`
`font_01_sfnt_off00007259.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7259	18356 bytes
SHA-256: `ed36b27b3f36e1d09c19690e7f017f96025b3159d1e0586fd8a26c5d6dd42277`

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