Malicious PDF — malware analysis report

Static analysis result for SHA-256 874d80df9ae1aba9…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 10:56:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5c08818cfc91722d39b2084f4d49e7e1 SHA-1: 2a54630e280b6a5522b35c3c86efb82038307d94 SHA-256: 874d80df9ae1aba9b259225ed4c82e9500363af1c1beadc554c2b3a692ecac1f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure associated with game hacks and generators. The presence of a "download button" heuristic further suggests a lure to download potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a social engineering attempt to redirect users to malicious sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-facebook-page-game-hack In PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-cheats-crash_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-pe-apk_GM479516143.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_004_off00005273.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5273 25012 bytes
SHA-256: a442a43844eabf73699bec20f84037e497bfb5f7b6bca8f0e4cf7a502bdaa1a1
font_01_sfnt_off00008c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C34 18480 bytes
SHA-256: c2031f29028d316a525723dce25d37222f39d47c7f71c2e87d16e38bd1d84d97

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