Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dda78927b0638a3…

MALICIOUS

PDF

44.2 KB Created: 2021-06-08 18:15:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ee4665fb4fb8d342f2c5d5fede6832e5 SHA-1: e6a5054b2d6e3df98f76331464b190619face6ee SHA-256: 2dda78927b0638a3f25b9465d1940174d503097b5d4e556c95ffd1ec3fba1587
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to free Robux and game hacks, directing users to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of multiple links to potentially malicious infrastructure reinforces this assessment. The document's purpose is to redirect users to potentially harmful content or further stages of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/divine-free-robux-game-hack In PDF document text
    • http://kukuck.de/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/robux-cheat-codes-ios_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/h-free-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/minecraft_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/robux-gratis_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-coin-master-spins-link_GM406889139.pdfIn 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_off00004c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C38 27200 bytes
SHA-256: 3393fabc1b9212463fe787457044d085254d69ea8aa22f3345db800d175added
font_01_sfnt_off000089f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F1 18416 bytes
SHA-256: 5b96205af3ecaeb32c603838bef6b1ad7cde6d277cef4300343d016eab5ccd20

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