Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db1ada01c26a80b…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 23:20:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5834d5685dea0997637293f20d1fff93 SHA-1: 761d2cdb78d4b7c57602441873a131158c0eef89 SHA-256: 6db1ada01c26a80b160ce4e8236955a689fad98ea4e050364a127b7bf97c7150
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a lure for game hacks and redirects to known malicious infrastructure. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites. While no scripts were directly extracted, the PDF structure and redirection heuristics indicate a likely attempt to exploit vulnerabilities or deliver further malicious content.

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.tw/app/406889139/get-free-spins-link-in-coin-master-game-hack In PDF document text
    • http://oca.undil.tl/repository/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/dex-20-free-download-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-jailbreak-hack-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/pubg-uc-load_GM1330123889.pdfIn PDF document text
    • http://oca.undil.tl/repository/pusheen-tshirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-at-freerobuxeu_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-accounts-youtube_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/pokemon-go-free-roam-hack_GM1094591345.pdfIn PDF document text
    • http://oca.undil.tl/repository/group-in-roblox-that-gives-free-clothes_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-girl-shirt-free_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/ccv3-roblox-hack-tutorial_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_off00002fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCF 22268 bytes
SHA-256: 5ef81f33706d1536abc2165933ca40fa6a761e7e2dc6437fdc848fad30be36e6
font_01_sfnt_off00006136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6136 18344 bytes
SHA-256: 223694a411494bb40917187ba899f9bcbf7f70620dafdd5c166b4f4298ff1984

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