PDF malware analysis — malicious · 42e0738059cd9dc7

MALICIOUS

PDF

34.2 KB Created: 2021-06-30 16:34:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: b2e736fedead91f99cfb18e8382f5cea SHA-1: 16aa681162b5fb32b3515629b283c1800964aa2c SHA-256: 42e0738059cd9dc71fa2e05f23a3af7bdab61232ce448c6dbb1cfb075653253c

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 0.9980

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 http://netcdn.co/app/431946152/free-roblox-gift-crafts-game-hack PDF link annotation
- https://goodtools.tw/upload/files/roblox-skin-free_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/roblox-undertale-3d-boss-battles-hack_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/cheats-to-get-cars-in-car-crashers-2-roblox_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/roblox-fashion-frenzy-free-online_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/roblox-follower-hack-2021_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-robux-promo-codes-september-2021_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/nopde-engine-roblox-cheats_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/como-tener-hacks-en-el-wild-revolvers-roblox_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/how-to-hack-roblox-accounts-2021-july_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/how-to-retrieve-hacked-roblox_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-safe-roblox-injector_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/real-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/tiktok-freein_GM835599320.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/get-free-robux-and-tix-no-survey_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_off00002ecb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2ECB	22496 bytes
SHA-256: `e9b1c14bcc8e01cf203e1df657a81fc7ce5a426945c98f6deab6064fd6db7341`
`font_01_sfnt_off000060f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60F7	18876 bytes
SHA-256: `f501522a01c444d7dc99f82a599d233aa28b83832b25a7b006b2fbfae4929426`

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