Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f7a6190880df50…

MALICIOUS

PDF

52.6 KB Created: 2021-06-04 05:40:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8f363c131097c00cdd179adc81397ef9 SHA-1: ba3d0de8ecef49b667c9ce3698306aa395ee1da4 SHA-256: 97f7a6190880df50239b28da0dac1cab8e134e25bd33c83cadfc60b9e3922f13
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a website offering a 'game hack'. The ML classifier and specific PDF heuristics strongly indicate malicious intent, likely to trick users into visiting a compromised or malicious site. No scripts were extracted, but the embedded URLs and lure content are sufficient to infer a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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/coin-master-free-rare-cards-game-hack In PDF document text
    • http://slims.abulyatama.ac.id//repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/daily-spin_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D2 25692 bytes
SHA-256: c12049e4586b547cdd0389cd9d2876e1c90f5e79e39dac3bf8c91eeec7637acf
font_01_sfnt_off00008de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE1 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off0000978f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x978F 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_03_sfnt_off0000ac1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC1A 17884 bytes
SHA-256: 13dc291ccbae0e6dfc42c40dac8b965d117c1bc6200047bd2049e93e12a4bb63

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