Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d59e81fb7309f3a…

MALICIOUS

PDF

43.1 KB Created: 2021-05-12 07:46:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bb873b05dfba7a5958fd1851b06eb054 SHA-1: a9b634df543a059e530ea4cd1c535d3886d5bb85 SHA-256: 6d59e81fb7309f3a318d694a1c7ca79c878e3da50e28151a8140e909a2688b83
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game generators and hacks. The heuristic 'SE_FAKE_CAPTCHA' indicates the document may present a fake verification prompt to trick users into further interaction. While no scripts were extracted, the embedded links are the primary indicators of malicious intent, likely leading to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/100-free-coin-master-spins-game-hack In PDF document text
    • http://alexandergroep.nl/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://alexandergroep.nl/images/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/minecraft-items_GM479516143.pdfIn PDF document text
    • http://alexandergroep.nl/images/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/roblox-system_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/how-to-hack-roblox_GM431946152.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
stream_003_off000047a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A7 29748 bytes
SHA-256: 5ef579f01dd281327aafd1f473a5a6695a3c234f0aec1f59b140572083263a15
font_01_sfnt_off00008694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8694 18164 bytes
SHA-256: 9d0cd5c2f7e80f3897417466f56f4718a74919a2dd6d9e748d2d2660ff396bc7

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