Malicious PDF — malware analysis report

Static analysis result for SHA-256 63dfa7b1a72d0146…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 23:13:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7ba81fe04b6eca0b5e70e09712483e1d SHA-1: 81e4f163a57d4b05e05e824ad0aa062cad858e3a SHA-256: 63dfa7b1a72d0146a0f4733960dee7ae0f2b0f14dc611058b5f657c1bf468351
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free generators. The heuristic firings indicate the document is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. While no scripts were directly extracted, the nature of the lures and the presence of redirector links suggest an attempt to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/free-mods-for-minecraft-pe-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/earn-rbx_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-no-human-verification_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_off000052b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52B1 25516 bytes
SHA-256: 864aec368e7ab76a7c5f0559265b3211e2348286170ea90d28c6b73cc264b016
font_01_sfnt_off00008c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8A 18040 bytes
SHA-256: 55677d50e7f19372d6dfb723d72c398dee248f925afb4425ab44c3bb4ecd28f4

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