Malicious PDF — malware analysis report

Static analysis result for SHA-256 d81d5182ddfc7a7f…

MALICIOUS

PDF

42.9 KB Created: 2021-05-10 17:01:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2499f980542ddfa42f0335e8a2dea289 SHA-1: 7111c51f9d8721cf9a8508410dcb1fd9f11040ac SHA-256: d81d5182ddfc7a7f40c9b7db10035d0e9d20144a1e66f67587b741d9226c680f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and potentially unwanted content, masquerading as game-related generators and hacks. The document body and extracted URLs strongly suggest a social engineering lure to drive traffic to malicious websites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/best-minecraft-hacks-game-hack In PDF document text
    • http://lib.unar.ac.id/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-websites-that-actually-work_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_003_off00004cd1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CD1 25464 bytes
SHA-256: 91512cf0c947818dc2d4ab9574f637dd78d5c75416a6e2a7e644837eb1020afc
font_01_sfnt_off0000869d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869D 17952 bytes
SHA-256: 6dfee1982b58ab3489cc821793519200b658269375d8b02cd788103d93863fb8

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