Malicious PDF — malware analysis report

Static analysis result for SHA-256 146113cdc23225b3…

MALICIOUS

PDF

47.8 KB Created: 2021-05-12 11:58:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 552e2758ee77ca84cf05c370651ded9c SHA-1: 223c1a70be2669fec9682a24f6951024713a3cba SHA-256: 146113cdc23225b307406acd91715c3570a9cd0892656fd0a63ec5c4fe48eaa3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to redirector infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games. The primary link leads to a known malicious redirector, which then points to other PDF documents hosted on a separate domain. This suggests a phishing or scam campaign designed to lead users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 4

  • 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.
  • 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/free-spin-and-win-coin-master-game-hack In PDF document text
    • http://apx-centre.ru/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004af5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF5 29984 bytes
SHA-256: 67fc3dc89fca9ae33e8b5c8eeb9815b9c8b9018fcac540a457ac2ec2cb890ef8
font_01_sfnt_off00008e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2C 2944 bytes
SHA-256: fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76
font_02_sfnt_off00009856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9856 18256 bytes
SHA-256: 9a1b20d80f3e4f809c9a9d9b8851ebdec2d0bde394b804bfd21e1aa58c8059b7

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