Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda1b35036c1517d…

MALICIOUS

PDF

45.0 KB Created: 2021-05-17 22:12:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d8b0f0e887da388e30ce0445ea092211 SHA-1: 0eab0fe9737815c4ddcfbedeeacaa6890b40ee56 SHA-256: dda1b35036c1517d84678d9dbdcbb6ffbdfd2b8b4fedb840f2ba3d85b58df067
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 deceive users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or phishing pages. The document's structure and embedded links suggest an attempt to exploit user interest in game hacks and generators to facilitate initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/431946152/www-rubux-game-hack In PDF document text
    • http://axiapublishers.com/images/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://axiapublishers.com/images/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://axiapublishers.com/images/free-robux-now_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://axiapublishers.com/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-link_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004787.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4787 26068 bytes
SHA-256: fe9e8645d3744ad3d425cc36d3fc48be8e86cf043a710ba68202ca0f5cb78351
font_01_sfnt_off00008410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8410 2836 bytes
SHA-256: fd98c8f6e7c2e74bbd5822409159a93ac5c94da083ae4c2eb269d4284375f9e8
font_02_sfnt_off00008db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB6 18068 bytes
SHA-256: fc38c016acc36c76b7a0729eb2c8d98b0fd59e97c8a3cfb4a698daadf76a8d1e

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