Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b19a434bf301830…

MALICIOUS

PDF

56.8 KB Created: 2021-06-10 23:24:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8009ab0aa4291cc689d07285ffa41059 SHA-1: 47df84404ee1e449c82e2ccba25e12877fbbc65e SHA-256: 9b19a434bf3018309e26472f16e9b76a4c898dad91444696b0d186d7e9a945b4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure theme related to game hacks and free generators to entice users to click on malicious links. The primary link identified, https://netcdn.tw/app/431946152/roblox-free-downloadf-game-hack, is flagged as a known malicious redirector, indicating it likely serves as a gateway to further malicious content or phishing pages. The presence of multiple similar URLs reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9560

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.tw/app/431946152/roblox-free-downloadf-game-hack In PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/free-coin-app_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005371.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5371 32144 bytes
SHA-256: 87a118f540dbe96ad800a246a670e101938c942c8f1869bfdef59f3cb888852a
font_01_sfnt_off0000a093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA093 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000ad36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD36 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000ba48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA48 18680 bytes
SHA-256: af8b3df478e53754c5fc19efb008ceb80aea1ceb5d2c2f698f3449251b2ad6b3

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