Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e0db06480a7bda…

MALICIOUS

PDF

46.4 KB Created: 2021-06-10 21:30:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0e70f2b0386a43299f5e16c6529d6361 SHA-1: 463f86d2e14ef612d0cecf6a15c4c138a95bef71 SHA-256: 45e0db06480a7bdac623649857fb5e8692fe4176924a6a473ffa0e62bab921d0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, disguised as free game hacks or currency generators. The primary lure URL is 'https://netcdn.tw/app/431946152/roblox-exploit-for-free-game-hack'. The document body, though heavily corrupted, contains references to Roblox and game hacks, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-for-free-game-hack In PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/lynx-hack-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-roblox-accounts-with-robux-and-obc-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/robux-websites-that-work_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F68 29072 bytes
SHA-256: 3ef8a53e37fddc3651de487d380d7c99840d9022fde6512912e96f0d77953249
font_01_sfnt_off00009294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9294 18348 bytes
SHA-256: e16ea6ec6a0066e2684a51e1a682d84a8953a49c44e9ad2e11ff8f238d0c0c33

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