Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8ac2b2bd036037…

MALICIOUS

PDF

43.1 KB Created: 2021-05-13 04:31:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5e7b9dd3f6280b0b5910758f0896b5b6 SHA-1: 5c09dc04bd603b947d0f18ca6b471c12345cce09 SHA-256: 6d8ac2b2bd03603712d6ca2db4a227cda062f9dec1cbd0679fa1534d3435aeb6
200 Risk Score

Malware Insights

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

This PDF document employs a lure related to 'free Robux' and impersonates Facebook to trick users into clicking a malicious link. The link redirects to infrastructure known for malicious activity, suggesting a credential phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and embedded URLs indicate a social engineering attack.

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/you-promised-my-son-free-robux-game-hack.
  • 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/you-promised-my-son-free-robux-game-hack In PDF document text
    • http://apx-centre.ru/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-hack-programmers_GM406889139.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_003_off00004971.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4971 24980 bytes
SHA-256: 1913c78ed5d85ce7d391c438667ca28400436d0ddffdaf72504dc9ad9c7d52d2
font_01_sfnt_off00008359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8359 19260 bytes
SHA-256: 86e86c6d1a3146e1f407edd8c9cf68c56566e4a3a2a05930f639aef478547eb3

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