Malicious PDF — malware analysis report

Static analysis result for SHA-256 43b9e1b03d4612fd…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 18:14:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 71884d8e99754922b0c1427c3e070ff7 SHA-1: 3f31774570bd23b2c118756d925baeabda1cdb62 SHA-256: 43b9e1b03d4612fd8e8755063e2313a18f78ebc9bf02574fca2d0a03372b9b8a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into downloading game hacks or cheats, ultimately redirecting to malicious infrastructure. The primary redirector URL is http://netcdn.tw/app/431946152/roblox-gift-card-free-codes-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

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.tw/app/431946152/roblox-gift-card-free-codes-game-hack In PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/get-free-robux-ad_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-one-piece-legendary-mellee-hacks_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-planet-free-robux_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-undetected-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-packages-free_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-cheat-tool-download_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-roblox-fast-load-v3rmillion_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-parkour-bag-hack-v3rm_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-robux-limited-edition_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-gravity-hack_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-island-royale-hack-aimbot_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/stick-master-luke-free-robux_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/ideos-para-hackear-roblox_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/downlaod-fly-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-hack-robux-no-human-verification-2021_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_off0000310e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310E 21688 bytes
SHA-256: d2345c772e1b5137aa0255833ba8e8d9b784b6a47a3100e5f8dd09e626eed69e
font_01_sfnt_off000060c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C0 19048 bytes
SHA-256: d4258182c942e07f86473ad6969c68da3094877f14729de5ac113415e402ceb5

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