Malicious PDF — malware analysis report

Static analysis result for SHA-256 0297a5fa37eed4c4…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 00:49:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 090d1e7636775ac4f8afc567513a4c33 SHA-1: 073233fc87f99a527060d6d9a53c8dc2662b09f4 SHA-256: 0297a5fa37eed4c4c93f28129c19c06573d819eeb04dc36beabfe3511a596143
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free in-game currency. The primary malicious URL identified is http://netcdn.tw/app/406889139/daily-coin-master-free-spin-apk-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a social engineering lure designed to lead users to potentially harmful content.

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/daily-coin-master-free-spin-apk-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-noclip-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/project-evolved-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/pokemon-go-free-yawn_GM1094591345.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-free-items-exploit_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-cheat-in-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hacking-roblox-account-script_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-hack-into-a-group-on-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-the-conquerers-cheat-engine_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-robux-without-bc-or-hacking_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-roblox-games-on-computer_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/howto-hack-gear-in-the-roblox-catalog_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
font_00_sfnt_off00002f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0E 22180 bytes
SHA-256: cb56868740837ebe6d95cfa2775dd0939b66dc0c58d59735a1d76decfb478b03
font_01_sfnt_off00006046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6046 18768 bytes
SHA-256: 20f7b44e526c10bc2e4fef9df4a675fd93804089751163aff3315ba8e0bc37cc

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