Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc443a1d9047e234…

MALICIOUS

PDF

35.4 KB Created: 2021-06-25 10:40:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5a9f794759b20da3e539826ca9bb5346 SHA-1: 69f98db8a113672a91006aaae66dbe045e1ff889 SHA-256: dc443a1d9047e234839eab031bcb7ac009c2cdb77b6308be31e94d3c25588191
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks. The embedded URLs, such as http://netcdn.co/app/431946152/free-roblox-gfx-person-pictures-game-hack, are designed to lead users to potentially harmful content or further malware downloads. The ML classifier also strongly indicated maliciousness.

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.co/app/431946152/free-roblox-gfx-person-pictures-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/cheat-roblox-wallhack_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hgow-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/sharkbite-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-are-people-able-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-counter-blox-roblox-offensive-hacks-esp_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33EC 22176 bytes
SHA-256: b7aa3804808d7676b14d820470aea41bb6469102fea2efa4da96d2e7353f0267
font_01_sfnt_off00006512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6512 19168 bytes
SHA-256: 249115905b6c7096efa9cb663d9674e9d7d5cf2e58b73154d016497823ef3d0c

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