Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a13797dd2f2dfd1…

MALICIOUS

PDF

41.9 KB Created: 2021-05-11 15:18:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4a839e12badcaf798c702c18d9d07ed4 SHA-1: 32c3f694bd9b7c923357066204b172e1cde2b258 SHA-256: 2a13797dd2f2dfd184add0620bac7fe37ee75883ba09ffb824ecbbcb01d7d79a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a lure related to game hacks and free items, directing users to malicious websites. The presence of multiple links to known malicious redirectors and infrastructure, combined with ML classification, strongly indicates malicious intent. The document's content and embedded links suggest a phishing or scam attempt designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.xyz/app/479516143/minecraft-hacks-xbox-game-hack In PDF document text
    • https://pustaka.mic.sch.id//repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-generator-com_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-scam_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-speed-hack_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_003_off00004843.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4843 25252 bytes
SHA-256: c3ec106f9bd2826060e9bc3db32a6de34e8000dedee4da19f6ebe28c59b9c1c3
font_01_sfnt_off000080d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D6 18476 bytes
SHA-256: 08d143bbdffcf64d63a65049f265cbb68e766144a512c2d0a1cb0386676e8729

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