Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b07c11ffce9b29…

MALICIOUS

PDF

42.4 KB Created: 2021-05-19 02:08:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3681f7b9121b7014e46ad05901a5581b SHA-1: b6fa10311d80d3f57282356c94c401a134a36dc6 SHA-256: 11b07c11ffce9b29ef145236982c6ecb36852c73583375a0ed2f2caa4d2f6078
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or generator. The primary malicious link redirects to infrastructure known for distributing malware. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at tricking users into visiting malicious sites, likely to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/martian-lettuce-coin-master-free-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-system_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/10-robux_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_off000049e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E1 25308 bytes
SHA-256: e5e794c4627a8e601d547566e25f1f6e0374c88471bcb637b2e10a7281ba2598
font_01_sfnt_off00008495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8495 17848 bytes
SHA-256: 87e0d40e779d2b7a8ffa368e3c7d26765f9a401596444c1bf6ba516daf2b347c

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