Malicious PDF — malware analysis report

Static analysis result for SHA-256 727e38931472bcf4…

MALICIOUS

PDF

44.1 KB Created: 2021-06-07 13:00:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 70f4110a0bc39a07d70e6d2ade2c97f3 SHA-1: 5fd70c8b031b7dc40e2c9fc142744e97aa6b2742 SHA-256: 727e38931472bcf49b823127e52170283f98a753ac5f132314071c6a813027aa
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a fake CAPTCHA lure to trick users into clicking malicious links, disguised as game hacks or generators. The document contains multiple embedded URLs pointing to redirectors and potentially malicious content. While no scripts were directly extracted, the PDF structure and heuristic firings suggest an attempt to exploit user interaction for downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/download-hacks-for-roblox-cheating-in-assasin-game-hack In PDF document text
    • http://arkivthy.dk/images/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • http://arkivthy.dk/images/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://arkivthy.dk/images/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • http://arkivthy.dk/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/free-links-for-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_off00004e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E06 24844 bytes
SHA-256: 55457dc847bf1a6721c458d25bee5dc47722d71437153c53548f1fa5f7d508b7
font_01_sfnt_off0000861d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x861D 19532 bytes
SHA-256: f0035e4b4abe394c101ccc497700efb5960ec4f72edd841c7beda486883c8e95

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