Malicious PDF — malware analysis report

Static analysis result for SHA-256 7acbe37839466e7e…

MALICIOUS

PDF

33.6 KB Created: 2021-06-30 06:31:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e98bc8af737d1e8280e073d492c550be SHA-1: 713c80a9defe44b9cff3ac22b7d7d93e2ac8b7ed SHA-256: 7acbe37839466e7e3431f4a43b1b4d951f9790e8df53bcbbdc4337d4e310223d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one that redirects to known malicious infrastructure. The document body and embedded URLs suggest a lure for game-related cheats or currency, likely leading to a phishing or malware download site. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-do-you-get-free-robux-without-verification-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-aimbot-cheat-table_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-remotes-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/robux-for-offers_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-hax_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-free-robux-on-computer_GM431946152.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
font_00_sfnt_off00002d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D14 21360 bytes
SHA-256: e7c1a4c2f2b248dfd06bb1645a74ebb1354fbec401e70da2d143b808e5f0053d
font_01_sfnt_off00005bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB4 19932 bytes
SHA-256: 264fe4d1adb6c2f6423507c0e695fe5f76dc4283267271e2216e058ac7e3b641

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