Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e7139232ab761f…

MALICIOUS

PDF

56.0 KB Created: 2021-06-09 04:09:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: daead28bfb3f03f4f5f61ed952657e3f SHA-1: de31125883474f53588d119a63ad82da5c554c44 SHA-256: 58e7139232ab761f89ca68dbff80decdd76d174b8370dfaf33aeba388bbbb61e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising game hacks and cheats for popular games like Roblox and Minecraft. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, and the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9373

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/roblox-exploit-scripts-free-game-hack In PDF document text
    • http://sbm-nn.ru/images/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/hack-roblox-espaol_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/como-hackear-en-roblox-a-la-gente_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-hacked-download-apk_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/change-roblox-username-free_GM431946152.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52A4 32600 bytes
SHA-256: 998b7f7b3e6a91ee87edbc7a88fef77a997bc399dd27a4b8a2554a29fc430df7
font_01_sfnt_off00009e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E3E 3936 bytes
SHA-256: 56f91d12f1fd26ee93de517f09e63ae86dd2fe155f74f5627c9f6637d22945ea
font_02_sfnt_off0000ab25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB25 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000b837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB837 18348 bytes
SHA-256: 5d9e46563cf19b67c59b78c280ad1013e0e7610906f8fa5e67c636264b3cac80

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