Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6d9174ddae9a44…

MALICIOUS

PDF

46.2 KB Created: 2021-05-17 03:41:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3938574db58bfa71c9e1b757947f27f4 SHA-1: ced732278ad9ae15cfc61e830531ecbc657fa6cd SHA-256: 8f6d9174ddae9a442408005d66984648ca6a75a77be70fb2e4a8c02f60ea0556
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to scam-related websites, specifically targeting "free Robux" or "game hacks." The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the nature of the lures suggest a phishing or social engineering attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9278

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.xyz/app/431946152/websites-to-get-free-robux-game-hack In PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/mcpe-free-download_GM479516143.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_003_off00004871.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4871 27884 bytes
SHA-256: 77fbe1edb8521cb0ac23184d676070dc8f270b61735e0a65822bc43f986d6363
font_01_sfnt_off00008807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8807 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000091b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91B9 18436 bytes
SHA-256: 6ab9ab31980840835fbaeca164a74f0e8188db39a6ce5c5e4face3e95ba0b523

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