Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba68ca08a1df47f…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 23:07:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3300fd2e770053cdfd20b6783c51b861 SHA-1: 4a93715b4517346e550a445bf7c9766b82fc57e5 SHA-256: dba68ca08a1df47f9585da4fa50b5724c22201c3b83ec755abee776c92ae94c8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising free game hacks and currency. The document body, though partially corrupted, contains text related to 'Unlimited Robux' and 'game hack', reinforcing the lure. The embedded URLs likely lead to further malicious content or phishing pages, and the ML classifier strongly indicates malicious intent.

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/431946152/unlimited-robux-game-hack In PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/tiktok-download-free-jio_GM835599320.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/tiktok-free-now_GM835599320.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/tiktok-free-skin-ml_GM835599320.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-free-link-daily_GM406889139.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_off00004eb0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EB0 24464 bytes
SHA-256: 34fc07b7b3b5410998db7b7fabeb26950b825dbf9cfacbad5d4acad532a27fdd
font_01_sfnt_off00008620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8620 18768 bytes
SHA-256: e6f43664123b30e8a11c386baeda00565b0269c6558a5a6efce4e8dd844d6876

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