Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6290e7cbdc6d51…

MALICIOUS

PDF

41.1 KB Created: 2021-05-16 17:43:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 88032ae0424f3f37b74dbe3054450030 SHA-1: 3eb1a170f3f163ae061140516f62056413d119a0 SHA-256: bc6290e7cbdc6d51e9b7ba09dd4c18af0fe97a2c9d381837bfa34cef31aa97e2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically targeting users with lures related to game hacks and free in-game currency. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a download button lure reinforces the malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/daily-spins-coin-master-game-hack In PDF document text
    • http://apx-centre.ru/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-village-3_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/www-claim-gg-to-earn-free-robux_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/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/is-coin-master-free_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
stream_003_off000047cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47CB 23868 bytes
SHA-256: f773c04769c01beda1944ab5f7e1693273a64a9569a6327b749c62eff0b80395
font_01_sfnt_off00007e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E63 18144 bytes
SHA-256: 1262f4d4cd034a4c9562a277dbba73095a6416475eb754b173a4e193cc6b3510

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