Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb8948ce467a9a7…

MALICIOUS

PDF

41.6 KB Created: 2021-05-20 01:52:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5c380c97beeeb5041b8af0125bffb3c1 SHA-1: 6ee0910eafdab09f0e528547b45ede68eb6a7ab6 SHA-256: abb8948ce467a9a723d411bb5621c961b368d141f150e041e8b09bba0e412bd0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically promoting "Coin Master Hack Online" and "free Robux" lures. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple redirector links indicates a clear intent to direct users to potentially harmful content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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.xyz/app/406889139/coin-master-hack-online-game-hack In PDF document text
    • http://reggieslockandkey.com/images/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/what-tiktok-free-robux_GM835599320.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/pubg-uc-midasbuy_GM1330123889.pdfIn PDF document text
    • https://reggieslockandkey.com/images/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/make-robux_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_off000049cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CB 24724 bytes
SHA-256: 9365e359849df2a32f6bcb2c5b0a3dfd53b9be055370d6ab4c0f03804a348ce7
font_01_sfnt_off000081b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B1 17788 bytes
SHA-256: fe6378a35aaddd1df9c91bfaa88201bdad89d62d9f4d299995ec0f595f057003

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