Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a3092446f6fe5f9…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 00:08:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e95974e76577c489d6fdce2ee46a61b0 SHA-1: 0fcf4d4a6c7f2ac137b6ed03688938ddd48552a4 SHA-256: 8a3092446f6fe5f91f47890995dc031dd6f96ff69b911922c76f6e1d813e108f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, redirecting to known malicious infrastructure. The document body also contains the same malicious URL, reinforcing the lure. While no scripts were extracted, the embedded URL and the nature of the lure suggest an attempt to redirect the user to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/haktuts-coin-master-free-spin-link-today-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-roblox-robux-generator-no-survey-no-download_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-tokyo-ghoul-project-killzone-hack_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/delete-free-roblox-account_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/abs-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/bloxburg-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-cheats-for-ios_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/picture-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-give-game-pass-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-1-million-robux-without-hacking_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/boku-no-roblox-hack-script-auto-farm_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-hack-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-hacks_GM479516143.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_off0000310a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310A 22512 bytes
SHA-256: bc662ad392e939391778f862da48c591b2b9611b762f86a1494c89d622f1b89d
font_01_sfnt_off00006322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6322 18840 bytes
SHA-256: 2eb33f29e5f0a270c974041c6ebecba72dad6cc1554e7739012cc853d86473b0

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