Malicious PDF — malware analysis report

Static analysis result for SHA-256 94bca1a8c8f9008a…

MALICIOUS

PDF

33.1 KB Created: 2021-07-05 18:30:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1a7099b8418a3ee29934a6126dc35633 SHA-1: 8dea609950804db9ea7d44e97fbf275b81c1d308 SHA-256: 94bca1a8c8f9008a94e50e4dbcb1ce02a9bd83c4317c21acb8c9cdf49177b95e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with 'free game hack' or 'free generator' themes related to Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. The document body, though partially corrupted, contains references to these lures and the primary malicious URL. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity, likely leading to a phishing site or a download of further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/roblox-sign-in-free-game-hack PDF link annotation
    • http://library.smpn2-byl.sch.id//repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/roblox-free-blue-shirt_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/roblox-1x1x1x1-hack-crazy_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/roblox-robux-hack-apk_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/roblox-source_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/is-tiktok-free-on-android_GM835599320.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/simplysarc_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-spins-for-coin-master-hack_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
font_00_sfnt_off00002dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD3 21500 bytes
SHA-256: ae10c33d25ca3974d0b2ff857eb694cb1eb09d6884c748c79d6e230c2fe1a8d1
font_01_sfnt_off00005cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFF 18768 bytes
SHA-256: 3ab6c6070bd7305523799bfbbbd7e2cf94c32bd360863863c53c92dc8f43febe

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