Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc92c3eaedfd831b…

MALICIOUS

PDF

55.3 KB Created: 2021-06-03 13:13:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4be20cc2f13428d2364fcbac8cb59cbf SHA-1: 613669c69b02a5a4e74f397270ae9d76a47584ed SHA-256: bc92c3eaedfd831ba98e85900de5eeb1a2712f67761f8717175593922d19dfc1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links to known malicious redirectors, specifically advertising game hacks and free generators. The primary malicious URL identified is https://netcdn.online/app/431946152/roblox-arsenal-hack-script-pastebin-game-hack. The document body, though partially corrupted, contains references to game hacks and embedded URLs, reinforcing the lure. The presence of multiple redirector links suggests an attempt to funnel users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9341

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/roblox-arsenal-hack-script-pastebin-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-online_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/mc-update_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005214.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5214 33972 bytes
SHA-256: 06db3a129a1231b8724fadd4ba3c87d069e0b211e85bd8298897afa15c65533e
font_01_sfnt_off00009d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3B 2892 bytes
SHA-256: 24bdc6e875b1fc9e5e8af246b8ecd348d80786c58c2b25dc6284917d11fdab88
font_02_sfnt_off0000a72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA72B 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000b43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB43D 18736 bytes
SHA-256: 7de8619ef554dfe1f2192c4aca90399aa0815846f6a8f71df992d0e349aeb038

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