PDF malware analysis — malicious · fc45909dcc72e576

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 22:12:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 33f463b4320d3c9fc3c887558eb671c3 SHA-1: 809273d03acd90e4cc48c40ad2e5d9d2822fc65e SHA-256: fc45909dcc72e576ebd9e6af58e24fd1221a24f9821bf14acc79cf273d1d3ac3

122 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 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

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/roblox-hack-descargar-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/roblox-hack-descargar-game-hack PDF link annotation
- https://www.kaojen.com.tw/upload/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/easy-robux-today_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/roblox-adopt-me-bucks-hack_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/spin-link_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/realhack-for-roblox-real-coding-hack-for-robux_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/more-robux_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/hack-para-roblox-final-stand_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/argent-infinie-lumber-tycoon-cheat-roblox-engine_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/roblox-free-battle-royale_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-ultra-attack-hack_GM406889139.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_off00002f7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F7B	22472 bytes
SHA-256: `b2588d1b2513fb459a38b8914a787e9867883e26b4d2de5d04810ff374ab489d`
`font_01_sfnt_off000061ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61EE	18824 bytes
SHA-256: `39cc1a4b3d65551709b9f7f831721da45b6ce7e3363545a94f8cc0c9a2be66bc`

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