Malicious PDF — malware analysis report

Static analysis result for SHA-256 de38acc23a66f7a7…

MALICIOUS

PDF

35.0 KB Created: 2021-06-22 15:55:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 910d901c78a44309c2b1bd1737624d74 SHA-1: 69fe07c1a90518448c5b18aca92b7ac7612b9280 SHA-256: de38acc23a66f7a787d6a479d99e3240c0c8658afd903635cf7bccd82171accd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a known malicious redirector, disguised as a 'Roblox Hack Bloob' generator. This lure is designed to trick users into clicking the link, leading them to potentially harmful content or further malicious downloads. The ML classifier strongly supports the malicious nature of this PDF.

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/roblox-hack-bloob-game-hack In PDF document text
    • https://trustindoutama.com/assets/CKImages/files/cm-free-spins_GM406889139.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/money-hack-urbis-roblox_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/comment-cheat-dans-boku-no-roblox-remastered-roblox_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/red-shirt-free-roblox_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/how-to-get-robux-with-cheat-engine-67_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/free-robux-only-username_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/how-to-get-free-robux-2021-5-3-17_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/deathrun-roblox-hack_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/roblox-cheat-engine-bypass-november-2021_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/free-minecraft-maps-pe_GM479516143.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_off000031ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EF 22928 bytes
SHA-256: 1b911c6747004ad2bdc164d45fb3bc3a9eca4874d9176c981052249404c85472
font_01_sfnt_off00006507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6507 18656 bytes
SHA-256: c0e3bc160ec821038b328d045f40ff375a03f7bc390fe6c9807bc39c1d4a7413