Malicious PDF — malware analysis report

Static analysis result for SHA-256 272b3dbbb12afce2…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 14:55:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: be974a5c248ff008fc33d3a746d05315 SHA-1: e2f4b480b33a9d64d4d1d24891f25ae6a61f9dd6 SHA-256: 272b3dbbb12afce2a9291422350ded8aef444c2ee3474fb5941d2d6ffc5d50ed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a website offering 'free game hacks' and 'alt accounts', a common lure for malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the embedded URL is a strong indicator of a phishing or malware distribution attempt.

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/479516143/minecraft-alt-accounts-free-game-hack In PDF document text
    • http://digilib.stimata.ac.id/repository/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/rbxdemon_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-links-to-get-free-spins_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_off000054bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54BF 26628 bytes
SHA-256: ff0f41a0fff23ce3d416337fafbcd2c5e30dedd41d26294835f958efd6ad349e
font_01_sfnt_off00008ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED6 17924 bytes
SHA-256: cf9503bd7fd14ff3d5423dc2d723381d788b8b94e195509a39a62f811928e518

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