PDF malware analysis — malicious · 2fd4fdecef777da9

MALICIOUS

PDF

34.3 KB Created: 2021-06-18 23:05:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 4d79219d40a22adf8af57f5f25ef171c SHA-1: befbbd9d07b77f471e98c15a5a67ca4fcd7e65fa SHA-256: 2fd4fdecef777da9377eaa979ebbcc044844ac695223181f8273b2eaa6c3f0ef

182 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 6

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.
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/hackear-roblox-gratis-game-hack.
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/hackear-roblox-gratis-game-hack PDF link annotation
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/roblox-fun-robux_GM431946152.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/hack-robux-gratis-pastebin_GM431946152.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-20212021_GM431946152.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/free-robux-scams_GM431946152.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/roblox-old-avatar_GM431946152.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
- https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/earn-free-robux-today_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_off0000302b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x302B	22248 bytes
SHA-256: `e5c0c33583b4dd0a0267e40a81969d297d5b315fc1c3265cf39591225e253f6a`
`font_01_sfnt_off00006173.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6173	18880 bytes
SHA-256: `0805f91e5dd08d8cf74bdc49bd642fa1084de130e16d19b07ec14f815bb59175`

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