Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc931c8a94b1d1fc…

MALICIOUS

PDF

47.0 KB Created: 2021-05-19 08:47:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 81fc7af7615f98d214f8aa28890e8d88 SHA-1: dd8288a79ad127246934b22e7738c52db6865907 SHA-256: bc931c8a94b1d1fc27430db31f41c2ac40ac38de3c05106ab979b0b08d52acd7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game currency ('Robux') to trick users into clicking embedded links. The primary link, 'https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-download-apps-or-survey-game-hack', is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirection workflow, likely intended to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/how-to-get-free-robux-without-download-apps-or-survey-game-hack In PDF document text
    • https://www.apollowebdesign.in/images/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/roblox-account-taker_GM431946152.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.apollowebdesign.in/images/free-rare-cards-for-coin-master-christmas_GM406889139.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_003_off00004a26.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A26 27120 bytes
SHA-256: 46fb92fa86a0caf6ca75ffad27e1a0267e9894ed345f669b0898d3eb1ac61a0d
font_01_sfnt_off00008697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8697 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9082 19880 bytes
SHA-256: a2325719e7076f7032f87f435cdda87ec67b0b67db20430c9492992df634e2b4

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