Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a10551de530fae9…

MALICIOUS

PDF

36.0 KB Created: 2021-06-26 02:35:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 331c0590b028cdffc1965aea39a87b68 SHA-1: ee7f970f9d8cfd21ea8ce577b8e9520219e7bd15 SHA-256: 7a10551de530fae92f102fe33ab20001f2ffc8f5750f657a187682ba0d0f5bb6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a malicious redirector lure, specifically targeting users interested in game hacks and free items for platforms like Roblox. The document body and embedded URLs point to a redirector hosted at http://netcdn.co/app/431946152/how-to-get-any-package-for-free-roblox-game-hack, which likely leads to further malicious content or malware downloads. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/how-to-get-any-package-for-free-roblox-game-hack In PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/top-10-mejores-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/pokemon-go-free-coins-no-human-verification_GM1094591345.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-redeemable-roblox-cards-2021_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/new-hack-for-roblox-2021-december-dpownload-medefire_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/hack-money-pizzeria-roleplay-remastered-roblox_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/roblox-hack-mobilenerator-net_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-hack-2021-pc_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_off000033e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E0 22720 bytes
SHA-256: 3de9ae62d17a098486ac4484b415905af444c95ab45137656d8a0d6c6c5b6391
font_01_sfnt_off000066c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C3 19420 bytes
SHA-256: 26c5ea61cc6400efc68f7e288f8f12e8fd98cda90eba43213517d532b6d0d6d9