Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee26fab6dbad3799…

MALICIOUS

PDF

43.1 KB Created: 2021-05-19 17:44:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9da239e908ff01ebb5f847bc22f2e757 SHA-1: d13384d90c564999ac98b2e295f28652608fbd02 SHA-256: ee26fab6dbad379943636c0e51ba1ece2e92e4aa509dc80ad2afc49e976dfd6b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on them by promising free game resources. These links redirect to known malicious infrastructure, specifically a site offering 'coin master free spins hack'. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack pattern is social engineering via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/406889139/coin-master-free-spins-hack-iphone-game-hack In PDF document text
    • https://www.brainpads.com/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • https://www.brainpads.com/images/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/free-coin-spin_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.brainpads.com/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/how-to-hack-people-in-roblox_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
stream_003_off00004b76.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B76 27084 bytes
SHA-256: 6a819d11460035a50d614fa67403f1607001f736c95fd7bd5ee8f6874ff30ac3
font_01_sfnt_off000086b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B7 18220 bytes
SHA-256: 1dfaaa5fda009d523ba1163bf16545e2c66f7621c16cb7ff5e9bef64f998ba72