Malicious PDF — malware analysis report

Static analysis result for SHA-256 736ff4069aa5552d…

MALICIOUS

PDF

34.8 KB Created: 2021-06-30 03:06:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bee992fd2c84e32c6dc06eed950ef7c5 SHA-1: 71a4077cca5d9eea32169c6b5d8fccb8739a4f35 SHA-256: 736ff4069aa5552d344e206e1b2094c8c139c1c7b353c09686498f9ec2019bc3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free game hacks' and generators. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-ruby-free-game-hack, which is flagged as a known malicious redirector. The document body and heuristics indicate a lure for potentially unwanted or malicious software, likely delivered via a phishing attachment.

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/431946152/roblox-ruby-free-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/hilton-hotels-lua-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/jump-cheat-wearedevs-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-code-generator-no-download_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-plants-vs-zombies-battlegorunds-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-items-in-dungeon-quest-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-100-dollar-gift-card-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/daily-coin-master-free-link_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_off000030f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F3 22436 bytes
SHA-256: 56b2baeb2f23328e2dc54e8e7b739e24eeac51aad5d550a811ef5301f7a52c9a
font_01_sfnt_off00006317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6317 18972 bytes
SHA-256: 4e38a15e8f7bbbc31650384c8ff89ef36443524b634f5fa0cf8e1152512463b6

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