Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5ef9afba057fec…

MALICIOUS

PDF

48.0 KB Created: 2021-06-07 15:46:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ecd67ee88e4cd800206bca8599381eb6 SHA-1: 55cb008ef109878b51dd7d4c95cd2b36eae05708 SHA-256: 9d5ef9afba057fec58ed112b9b3792aeef13ad94161440a9dba339884ec9ab05
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. While no scripts were extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/como-tener-los-hacks-de-xonnkek-roblox-jailbreak-game-hack In PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://sbm-nn.ru/images/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-toys-codes-hack_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005015.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5015 26056 bytes
SHA-256: 3c110f3224ec6160c539d36f56e96ca24cda96808d6ce5e05a329a39ab90a5d2
font_01_sfnt_off00008a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A96 3516 bytes
SHA-256: 1dd230e0edda4f5ae15d752c213ed6424840ede9eeceb94def380517ab7f8768
font_02_sfnt_off000096ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96FF 18896 bytes
SHA-256: 143e8ec77a2474beea00337d1f8340b4cd5f54af4211cf6190b1248507ce42b1

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