Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efe496c3505d3f4…

MALICIOUS

PDF

44.2 KB Created: 2021-06-04 05:24:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3a3831d3a65d6f06cc5436fccdc34657 SHA-1: d019c7181a934f209441fc9d159556a2dd80674b SHA-256: 6efe496c3505d3f4097d48e4baf6fda1de3d501318e9e592ad0e6579a2b4a2ad
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free items, such as 'minecraft-pe-free-download-game-hack'. These links are identified as malicious redirectors and part of a link farm. The document body, though partially corrupted, also contains similar lure text and URLs, indicating a social engineering attempt to drive traffic to potentially malicious sites.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/minecraft-pe-free-download-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/wurst-download_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-without-survey_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_off000051f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F8 24528 bytes
SHA-256: ef2b2dbe88b03317e995a9587a31e717d707c11ed01ee703f81685ef38cdf3b1
font_01_sfnt_off00008995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8995 18444 bytes
SHA-256: 41511c969eed7dcbefdd8737ff0e878d59d6c8a64165a5defd1345ec3b98e320

Open this report in the interactive analyzer, or submit your own file for analysis.