Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f8f2bf885ec0f60…

MALICIOUS

PDF

47.6 KB Created: 2021-06-04 01:55:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5a1bd3d61b4607e6f1e088cb43c73aae SHA-1: 16125963fce47a0e1c36cf84ed00817477e78b8a SHA-256: 7f8f2bf885ec0f602567c5dc73d610b0dac25ef6abdcc0be4a7b71704aa607b2
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them by promising free game currency or hacks. The primary link redirects to malicious infrastructure, and the document body itself contains a call-to-action with a URL. The presence of multiple SEO-optimized PDF links suggests a link farm intended to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/431946152/free-robux-generator-for-roblox-2021-game-hack In PDF document text
    • https://perpustakaan.itda.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-free-printables_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-clothes-on-roblox-id_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE3 26788 bytes
SHA-256: 4edb743f0502e0a6737eae6345b7e5c9bea34d0ffb0407445ae2217c4bfe2083
font_01_sfnt_off00008be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE1 2832 bytes
SHA-256: 78e89c8f621d90011ffb7a2107d701d4cdf090a2f2cf42d5a65297289afc8805
font_02_sfnt_off00009592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9592 18820 bytes
SHA-256: ebe9c90542e8fe2fea15c90130dc88571bff9717049b6ef0e566bae53a322baf

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