Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6678c5d8078f3c…

MALICIOUS

PDF

37.1 KB Created: 2021-06-30 17:32:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5767ceb48dd918c094f37d7968905470 SHA-1: 433bd1616859b5c67869a330aa5265441742f4b0 SHA-256: 6b6678c5d8078f3cc65964cc6dc822e0c5316933b6d2bbf66d5e2cf9f69782a4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free generators. The primary malicious link identified is http://netcdn.co/app/431946152/roblox-virtual-piano-hack-game-hack, which is associated with redirector infrastructure. The document's content and embedded URLs suggest an attempt to lure users to malicious sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-virtual-piano-hack-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/generator-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/wurst-client-download_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-grand-blox-auto-cheats_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-human-verification-and-no-application-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-group-funds-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-roblox-gear_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-robux-script_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hacking-system_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-hair-on-roblox-no-inspect-element_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/pokemon-go-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-no-human-verification-android_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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
font_00_sfnt_off00003b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B5C 21844 bytes
SHA-256: 07f26f2b3d642cc00554e2cc7b21523d797b06272e51f568c2adfbd7bb3ea71c
font_01_sfnt_off00006b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B61 19308 bytes
SHA-256: ac0b12c82d559b3be72d30cf0fcd146027b3ab84b7bf4186176777d7e9befd2b

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