Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48bcb07c26f5920…

MALICIOUS

PDF

45.5 KB Created: 2021-05-14 06:05:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a783281206491b7216dc5d186c71d111 SHA-1: 5538e7f32cd698b972a4a4131486c005e71617c7 SHA-256: b48bcb07c26f5920e78447b6d9e316f1390d644be33fdee0b8b412ff09f9bcd7
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed as a lure, impersonating brands like Amazon and offering 'free generators' or 'game hacks' to trick users into clicking malicious links. The document contains a large number of external links, many pointing to PDF files hosted on 'poonhilltreks.com', suggesting a link farm or redirection scheme. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-roblox-outfits-2021-game-hack, which is likely used for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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: https://netcdn.xyz/app/431946152/free-roblox-outfits-2021-game-hack.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/free-roblox-outfits-2021-game-hack PDF link annotation
    • http://poonhilltreks.com/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/grab-points-login_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/worst-client_GM479516143.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/how-to-hack-roblox-accounts-on-phone_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.

FilenameKindSourceSize
stream_003_off00004ab5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB5 29960 bytes
SHA-256: 6417af2eaae481977f8d02749cbc8babbbcc335922ddeae3f17f8306a9c2a57b
font_01_sfnt_off00008e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E35 18712 bytes
SHA-256: 08924b32c91b27fd5bb3b33addbb65fc5755536ddb9ff57fccc382b8f67ce437

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