Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07d16c68b38673d…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 22:55:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: dcad4cb541f775c01c705932a0ff5fcb SHA-1: cbc6045fab86dc5ea8017056a31bffb54a426691 SHA-256: a07d16c68b38673d1543ef43c305b015a448a9fad46047fcd9f5dc7f37641125
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, including one that masquerades as a game hack. The document body and embedded links suggest a lure for users seeking free in-game currency or cheats. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely intended to deliver a second-stage payload.

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/how-can-i-get-minecraft-for-free-game-hack In PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/get-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-free-coins-link_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_off0000514b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x514B 24572 bytes
SHA-256: 7180705fd202581b9011b2f9c87a6f04bd501a25bf8bfbe52d9ec55e5b24784b
font_01_sfnt_off000088a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A5 17872 bytes
SHA-256: 1780a854c5ecbb5a6dec58bf2aafa1430e4c4f4d2029e52ddf9488ce5dd697b0

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