Malicious PDF — malware analysis report

Static analysis result for SHA-256 185fe8a6379c9af6…

MALICIOUS

PDF

46.5 KB Created: 2021-06-08 15:21:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 018ad8fe1708665e1feeeeeec5a6ff1b SHA-1: 1583e11febb8941d668b29be2de026f6de77b84e SHA-256: 185fe8a6379c9af640d00c3757b91cce8ee67938871fb4bf4ca9f2be967075b8
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains multiple links to redirector infrastructure, specifically promoting a 'game hack' lure. It also displays a fake CAPTCHA to trick the user into interacting with the document, likely to initiate a download or further exploit. The primary IOC is the redirector URL which is designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/hack-dragon-ball-rage-roblox-2021-game-hack In PDF document text
    • http://leagueforwomenrights.gr/images/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/master-game_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/tiktok-download-free-jio-phone_GM835599320.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/roblox-free-troll-outfits_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/how-to-use-cheat-engine-63-on-roblox-free-robux_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
stream_004_off0000513b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x513B 27772 bytes
SHA-256: b511fc83d1bbbdb2a0575e246dc4de45352492a15e9717d7e183164cc012063c
font_01_sfnt_off000090df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90DF 19040 bytes
SHA-256: 4c673d70854f344106d13e53b29fe87e3138e65e8545d564c7dc60608dc4ce85

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