Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7e0b3354f88435…

MALICIOUS

PDF

45.2 KB Created: 2021-06-04 02:17:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1808f25f2b846638ed7f63037decb838 SHA-1: f35487d882c8b9459f5ac97ca7b0f54b245cb465 SHA-256: 2f7e0b3354f8843509e955f6a6ea834226788d7904897b3a5beace5d4d295aa1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free Robux'. The document body and heuristics confirm the lure is related to obtaining free in-game currency or hacks, which is a common social engineering tactic. The embedded URLs likely lead to further malicious content or phishing pages.

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/431946152/how-to-get-2021-robux-for-free-game-hack In PDF document text
    • https://opac.heritagejkt.org/repository/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/real-roblox_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/tiktok-free-64-bit_GM835599320.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/script-executor-roblox-free_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_004_off00005177.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5177 25396 bytes
SHA-256: 8aea660acad03d4687b1fcd143e2bc8ebcacf142bcbb29630087e7c30b843f48
font_01_sfnt_off00008cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAC 18684 bytes
SHA-256: 6e9c0eecafd635f65838c8dbfb1e23e8457e4c9239d4b33e445d621fd980b18f

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