Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe832d6369b71aec…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 08:19:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4e9d78780253036a9318d50bd3383a32 SHA-1: 285d15b8df11044964f2260370e1ce777f7c265d SHA-256: fe832d6369b71aece76faeea06d265d9fae9f2658494cc54ad2fc7a66dd3238c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them, disguised as generators or hacks for popular games. The primary link, 'https://netcdn.online/app/406889139/free-pet-food-coin-master-game-hack', is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/free-pet-food-coin-master-game-hack In PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/pokemon-go-free-coins-hack_GM1094591345.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/how-to-change-your-username-on-roblox-for-free-2021_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
stream_004_off000051cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51CD 25132 bytes
SHA-256: 7b67a76f2e8b1f8ecec6ff6311dc7eb7c0989f307cfa76fecb684e98d90cc36b
font_01_sfnt_off00008b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9F 18040 bytes
SHA-256: 80b08f0f47efeae7474973f213c4bda075b9244837f94a62dadeca22caed91d8

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