Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f064af3e46c2f1f…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 10:51:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f78f78843130f769397090b762344111 SHA-1: ff86b879a8be182abbcdfb49f3b079f6b946bb64 SHA-256: 0f064af3e46c2f1f3d955ce616cf0f6983ba7c1a09f2f330c7248535e5f1e3c3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/how-to-hack-a-roblox-account-2021-game-hack. The document body and heuristics indicate a lure for game hacks and free currency, designed to trick users into clicking malicious links. No scripts were extracted, but the presence of malicious links and the lure suggest a phishing or redirection attack.

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/how-to-hack-a-roblox-account-2021-game-hack In PDF document text
    • https://library.sttbandung.ac.id/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-hack-extreme-nijecotr_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-pastebin-stuff_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/https-www-roblox-com-free_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-do-you-get-free-admin-commands-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-moderators_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-star-wars-clothes-on-roblox-games_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/which-pokemon-go-free-server_GM1094591345.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-robux-hack-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/inspect-elements-robux-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
font_00_sfnt_off000030b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B1 22700 bytes
SHA-256: 88a17fe12727e3d9cd59f4ac6747df16d218df8b9ecc9da2014d984e19ead7c6
font_01_sfnt_off00006360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6360 19468 bytes
SHA-256: 8490c018c81cc22f14dab8ddf5d074d9e4c4287532f70e565512aa2c5e2164f3

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