Malicious PDF — malware analysis report

Static analysis result for SHA-256 952583897b0916fc…

MALICIOUS

PDF

226.5 KB Created: 2021-07-05 04:44:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8b71bd372ad892209d7e56646002f7f0 SHA-1: 470d1f14799e7389e4de8ef10110254501114ac9 SHA-256: 952583897b0916fcce872fd93311c8db2476df0c927073b083ab38c43821c94e
250 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating social engineering lures, including a fake CAPTCHA, a download button, and a browser extension installation prompt. The primary lure is a link to a 'free generator / game hack' which redirects to a known malicious infrastructure. This suggests the document is designed to trick users into visiting malicious sites, potentially for malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 7

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.tw/app/1094591345/pokemon-go-free-coins-android-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/comment-hacker-un-compt-roblox_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-in-to-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-zone-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_023_off00031e7b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E7B 25576 bytes
SHA-256: dd0bc070c04b81d46c3c2c0a2e323875881bd1e7ff598b4d0f7e1921b57c5c9c
font_01_sfnt_off00035a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35A7D 18652 bytes
SHA-256: 5114630adb8fdbaa6ae9d5c54027c65078ed249b923c0f1fd40015d9c4d136f7

Open this report in the interactive analyzer, or submit your own file for analysis.