PDF malware analysis — malicious · 5122df53ccdfae74

MALICIOUS

PDF

46.3 KB Created: 2021-05-19 12:47:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 8c82cdc72ba2fba9beaea1aac547aa98 SHA-1: 1c364721b2498dc34341e2f61083aeda28b6f409 SHA-256: 5122df53ccdfae74ec43da5eb8d80f4a6e6877feb13a29ff665917c186be842b

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.8696

Heuristics 5

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.
PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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/431946152/roblox-hacks-and-cheats-game-hack PDF link annotation
- http://montchanintt.fr/images/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
- http://montchanintt.fr/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://montchanintt.fr/images/what-games-give-you-robux_GM431946152.pdfIn PDF document text
- http://montchanintt.fr/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
- http://montchanintt.fr/images/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
- http://montchanintt.fr/images/coin-master-100-spin_GM406889139.pdfIn PDF document text
- http://montchanintt.fr/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
- http://montchanintt.fr/images/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
- http://montchanintt.fr/images/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
- http://montchanintt.fr/images/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
- http://montchanintt.fr/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- http://montchanintt.fr/images/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
- http://montchanintt.fr/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
- http://montchanintt.fr/images/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
- http://montchanintt.fr/images/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
- http://montchanintt.fr/images/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
- http://montchanintt.fr/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- http://montchanintt.fr/images/op-rewards-free-robux_GM431946152.pdfIn PDF document text
- http://montchanintt.fr/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
- http://montchanintt.fr/images/master-coin-hack-game_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004b2a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B2A	25056 bytes
SHA-256: `d752d836d1cb957d87c6aa7c5e2958a2b6d7901b8f0a3f16884df14d2c11250b`
`font_01_sfnt_off000084c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84C1	3884 bytes
SHA-256: `40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf`
`font_02_sfnt_off00009169.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9169	18624 bytes
SHA-256: `fd38699d39b76a4f9eae772e1d62c447b40f492bf7651a7365d5b223074a20b1`

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