Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d39304a6470c29…

MALICIOUS

PDF

39.4 KB Created: 2021-07-04 23:07:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1d90c16ea8ed8aefd8f3dad7eaed98f5 SHA-1: e5a9525e7651466c6af806f367795b39e5822fe3 SHA-256: 78d39304a6470c29fa8270abea23164cf0a6ad08247212f05f393a186769a410
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, specifically advertising 'free generator / game hack' content. The document body and heuristics indicate a lure to download or access game-related cheats, which is a common social engineering tactic. The primary IOC is the malicious redirector URL used in these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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.tw/app/479516143/minecraft-windows-10-hacked-client-game-hack In PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/how-to-get-free-robux-on-computer-2021_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/free-roblox-hats-2021_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/10-robux_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/pubg-uc-2-all-pro_GM1330123889.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/robux-hack-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/coin-master-support_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/how-to-get-free-real-robux_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
font_00_sfnt_off000034fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34FA 22276 bytes
SHA-256: bb64268d0ad1fb36ed5d6189192406f9ab5c4397c3c4ef147a02f4e5cf9d5723
font_01_sfnt_off0000663d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663D 4440 bytes
SHA-256: 6a4c6a8bb716d5784c68a8817fe27c80ea0201b5e507a09cdd5e8064225e100b
font_02_sfnt_off00007503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7503 19056 bytes
SHA-256: cf25c1e073cb72c1ef0c5f26106c3c01589224d1b658977947a7aa510d1ce141

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