Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5797f1529d1b35…

MALICIOUS

PDF

42.8 KB Created: 2021-05-12 04:32:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5bc974f40ef648e29e5967cb25f520ad SHA-1: 2e6f422367cb3b771aa54700c437ffe2fa6a1319 SHA-256: ec5797f1529d1b3511d6515e9961b701fa5728c8ccf4f009c96cd41c671d0227
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to known malicious redirectors and lures users with 'game hack' content. The primary link, https://netcdn.xyz/app/406889139/coin-master-hack-download-apk-game-hack, is flagged as malicious and part of a redirection scheme. The document body, though partially corrupted, also contains references to game hacks and URLs, reinforcing the lure.

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-download-apk-game-hack In PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/minecraft-fly-hack_GM479516143.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_off00004a64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A64 25904 bytes
SHA-256: 6931855e4b3398e8c1fb894cb561fee3a3d96ba1e94b50ae0514579621c0affc
font_01_sfnt_off00008436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8436 18472 bytes
SHA-256: a0b4f907e64f54d1e36da46d63ed408052d589db2dcff26c8dd3e6dd691bcc85

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