Malicious PDF — malware analysis report

Static analysis result for SHA-256 122dbb4b6804b71e…

MALICIOUS

PDF

45.1 KB Created: 2021-06-04 03:55:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 20a3b4f6e4956f297ed53caf6a1261ff SHA-1: 6f4c5097e850ef339fac327d71ae546f2cfe9d0c SHA-256: 122dbb4b6804b71ea20a1512f19a6133e12768a9404c6aa097240241f4bfc824
200 Risk Score

Malware Insights

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

The PDF contains a lure for free Robux and game hacks, impersonating Facebook to trick users into clicking a malicious link. This link redirects to infrastructure known for distributing malware and hosting phishing content. The document body, though heavily obfuscated, contains references to the malicious URL, reinforcing the phishing and redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.online/app/431946152/free-robux-download-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
  • 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.online/app/431946152/free-robux-download-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/master-coin-free_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-hack-into-someones-roblox-account_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_004_off00004ef1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EF1 26100 bytes
SHA-256: 8c50a5b04c7ceb41e7743a1552703bbc83f1ae41a38e34535ab4b974b03b424d
font_01_sfnt_off00008c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C19 18824 bytes
SHA-256: 8406cb1c38774726d91b6a9fb5333918f35ff34bd7dcb56cd5a50b6af28a82ee

Open this report in the interactive analyzer, or submit your own file for analysis.