Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b212dbba833de1…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 23:10:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: be972bc62069058dd57f692c818f389f SHA-1: 4baedc93438f7f22be078d830313e8ca994b3a62 SHA-256: 27b212dbba833de1af673ea9795109d9bd40dc82cede9dfb087ed416c7c44054
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a site offering a 'Coin Master Hack'. The heuristic firings indicate that the PDF links to known malicious redirector infrastructure and is designed as a lure for game hacks. While no scripts were explicitly extracted, the nature of the lure suggests an attempt to trick the user into downloading a second-stage payload, likely through the embedded URLs.

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/406889139/coin-master-hack-version-download-2021-ios-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/tiktok-free-upload_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pokemon-go-free-app-download_GM1094591345.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-download-no-sign-up_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/blox-rewards_GM431946152.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_off00004d2f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D2F 24072 bytes
SHA-256: 0e2228c144eda075cac8c0cdb3b25dfb630100f965461a3840ce4c4954b250a5
font_01_sfnt_off00008425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8425 18832 bytes
SHA-256: cc7b03749ee8e0bb295fc18f3327ccd24d21e4560feed49354a921164f87bbf0

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