Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd4c6c277f13a56…

MALICIOUS

PDF

45.4 KB Created: 2021-05-11 05:00:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bd858da575b513834e6b9d47bae75c20 SHA-1: 3e76900b305d64d26acdee164cc74c9b3ed2853b SHA-256: dcd4c6c277f13a564747fcc79dc0c236ab4c1a9bb8ffb3584dcaa6a9be985150
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs that lead to a known malicious redirector, masquerading as a 'free generator / game hack'. The document body and heuristics indicate a lure for free game currency or hacks, likely intended to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure itself facilitates the 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 https://netcdn.xyz/app/431946152/free-robux-youtube-game-hack In PDF document text
    • http://immo360grad.com/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/free-spin-link-in-coin-master_GM406889139.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_off000048d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D5 31272 bytes
SHA-256: 1e8f19ff094d4b975406d16aa7598261b8bd77f28609a6e39283781240f31100
font_01_sfnt_off00008f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4B 18280 bytes
SHA-256: de5b074060e7ee0fa0230ac6212805924cd4a5679e09505111534b28358c176b

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