Malicious PDF — malware analysis report

Static analysis result for SHA-256 d474100a26da4995…

MALICIOUS

PDF

32.9 KB Created: 2021-07-03 23:49:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 81514a399596361f96bcff45a7353d28 SHA-1: feb274738310652ba59f2e3e3e4e98b15b4bef3f SHA-256: d474100a26da4995a45b5cc490905b895ebc2acfc8a54904591167703acc3580
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a malicious redirector infrastructure. The document body and heuristics suggest a lure for game hacks and free spins, aiming to trick users into visiting potentially harmful sites. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to malicious content.

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/406889139/legit-free-spins-coin-master-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-dope-charecters-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/ghost-hack-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-levitation-animation-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/light-pack-roblox-mining-simulator-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/seitama-roblox-free-shop-t-schirts_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/juno-hack-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hack-jump-for-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-roblox-bypass-audio-maker_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-cheat-engine-bypass-june-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-earn-robux-without-cheats_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-reatai-tycoon-hack_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_off00002deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEB 21940 bytes
SHA-256: df7a4086fa324f430defdeacb73455773c745e6c29c15fae86e26211c0978305
font_01_sfnt_off00005e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E35 18176 bytes
SHA-256: 306c3b6095d1991059b25385d3e7cac4e1613d3ee958be56c36e50ec503f6c94

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