Malicious PDF — malware analysis report

Static analysis result for SHA-256 a246da2929319c86…

MALICIOUS

PDF

49.0 KB Created: 2021-06-03 17:12:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 63360fa6d89f74e46d00b944d799ca02 SHA-1: b250204b800ea3e0c8f7bec1b499b8b6c18cd099 SHA-256: a246da2929319c8654cdcbee0c230bd661d5ba97b296c7160c3b23b51d4ba71e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirector infrastructure, specifically pointing to 'netcdn.online'. The document body and heuristics indicate a lure for game hacks or generators, likely to lead users to a phishing or malware download site. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a common pattern of using social engineering to trick users into navigating to malicious sites, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/how-to-use-redstone-game-hack In PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-roblox-no-clicps_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://www.freenom.comHeyIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005464.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5464 30704 bytes
SHA-256: b355b413a263bfbf8c6c8bf3b18f947b603b721025ae6394c20675a289fc88ff
font_01_sfnt_off00009438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9438 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E48 17884 bytes
SHA-256: 49225106bdef37dc12b43e070aa0b6f880d37999c864f067329419f213985cc4

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