Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc151216e54651a…

MALICIOUS

PDF

33.4 KB Created: 2021-06-25 18:49:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 230f66bdf6453e3eaf3605b32000a0eb SHA-1: 8123fbb6fb3e25bcf2ca06c8797a030621ba279c SHA-256: bdc151216e54651ab45b63616fd3f50aa6b7830ea71613a623f5ab5a66933256
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to malicious infrastructure, specifically advertising 'game hacks' and 'free spins' to lure users. The heuristic PDF_GAME_HACK_REDIRECT_LURE directly identifies this malicious redirection pattern. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at driving downloads from malicious sites.

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.co/app/479516143/minecraft-mac-free-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/clip60-upload-avxiy74olhs-get-free-pants-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/camping-roblox-game-how-to-get-free-items_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/protosmasher-roblox-hack-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/hack-programs-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-printable-coloring-pages-of-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-do-you-get-free-robux-on-a-phone_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-pdf-colouring-page-of-roblox-characters_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3162 21748 bytes
SHA-256: 3be729e5ff4d8e3076e3b9cdaba9bda4ec2208bc716c2e1777371d58491a66bf
font_01_sfnt_off0000613d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613D 17856 bytes
SHA-256: cc1e3add4a04a98446b1b55314af2162444863ccaf169a3449495116b9daf471

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