Malicious PDF — malware analysis report

Static analysis result for SHA-256 83de7423fbff418d…

MALICIOUS

PDF

42.8 KB Created: 2021-05-12 10:20:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 217f39ae656183132112b83e1f55e3a7 SHA-1: 5e7285e62f98f3552c2db9ff8bf8ec9eab161829 SHA-256: 83de7423fbff418d7fe255058437438ccd5cdeb470c809c6e53e919592ec6ee7
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free generators to entice users to click on embedded links. The primary link, https://netcdn.xyz/app/479516143/minecraft-bedrock-edition-hacks-game-hack, is identified as a malicious redirector, likely leading to further malicious content or downloads. The document body contains garbled text but includes the malicious URL and other suspicious URLs related to game cheats and hacks, reinforcing the lure. No scripts were extracted, but the presence of malicious redirector links and the lure content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/479516143/minecraft-bedrock-edition-hacks-game-hack In PDF document text
    • https://www.mrsz.ir/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://www.mrsz.ir/images/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/free-things-on-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_off00004a3b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A3B 25804 bytes
SHA-256: 7b42befdde88b512d84c18939417274f3cf229fd8a8eea39deca6983e0002fd2
font_01_sfnt_off00008506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8506 18268 bytes
SHA-256: ab11a404ecd1e05d7423e813f114c97ddc1b622607c5cfcfecdb5803810a7c8b

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