Malicious PDF — malware analysis report

Static analysis result for SHA-256 03411fb21d621734…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 12:33:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c50dd7f461fc48652e280d8b84d6a0b6 SHA-1: c9f6eb22a302566a221e06f04ebdd3867accb623 SHA-256: 03411fb21d621734f6ecb6d1a0103ae63e0772fec5cdbfc8b07142c3b2ceaecd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that are identified as malicious redirectors, specifically luring users with promises of game hacks and free currency for popular games like Roblox and Coin Master. The document body and embedded links strongly suggest a phishing or scam attempt designed to drive traffic to potentially malicious sites. While no scripts were extracted, the presence of malicious links and the lure indicate a high likelihood of a phishing or malware distribution campaign.

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-hack-2021-game-hack In PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-hack-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-promode-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-items-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/login-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-hack-client-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/more-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/template-roblox-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-candy-decal-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-roblox_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_off0000300f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300F 22664 bytes
SHA-256: 5b0e25e671a2c7be60d97bed2b51c49ea72b163972325d9af50f8e0f41aff463
font_01_sfnt_off000062d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D4 19056 bytes
SHA-256: 98be41374c31724b7a878275a9dc475d7e9908887f4f5935c763b7161266aa61

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