Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c196e47abe04f2a…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 11:58:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3e35b2bd37481292d473601064bb69a1 SHA-1: 125ee650503502780489eead5f3a1ee482e92900 SHA-256: 2c196e47abe04f2ae876b2e9872851aee5e80a6972322877a4ffcd99fdd97d3d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector URL, which is flagged as malicious infrastructure. The document body and embedded links suggest a lure for free game currency or hacks, a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/431946152/rbx-gg-free-robux-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-promo-codes-2021-no-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f38.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F38 26372 bytes
SHA-256: a693d2ba1a7dc5a3b4ff82c76341ed2d67aac6b4ff4f8c88294afb44914bfc7e
font_01_sfnt_off00008b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B40 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off000097e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E7 18304 bytes
SHA-256: d1ad45f5b083d36c6ec4c124be04f92537ae8dd31535970cb7662339535ad89d

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