Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dab159361da6329…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 00:41:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e309b819db4dc9e63ec884135a0c5634 SHA-1: 25e43c8dca03769ef9d03a6d457da11751b51321 SHA-256: 4dab159361da6329e08e4f92967f93e49ff94ea550942379c02a1b74a3165879
200 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to malicious infrastructure, masquerading as generators for in-game currency and game hacks. It impersonates brands like Microsoft to enhance the phishing lure. The presence of multiple redirector links and the ML classifier's high confidence score indicate a deliberate attempt to lead users to potentially harmful content or further exploits.

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/how-to-get-free-robux-on-chromebook-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/how-to-get-free-robux-on-chromebook-game-hack In PDF document text
    • http://dcmetroapp.com/images/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://dcmetroapp.com/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://dcmetroapp.com/images/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://dcmetroapp.com/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://dcmetroapp.com/images/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://dcmetroapp.com/images/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://dcmetroapp.com/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://dcmetroapp.com/images/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://dcmetroapp.com/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://dcmetroapp.com/images/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://dcmetroapp.com/images/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://dcmetroapp.com/images/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://dcmetroapp.com/images/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://dcmetroapp.com/images/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://dcmetroapp.com/images/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dcmetroapp.com/images/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • http://dcmetroapp.com/images/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://dcmetroapp.com/images/rbx-hut_GM431946152.pdfIn PDF document text
    • http://dcmetroapp.com/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://dcmetroapp.com/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00004982.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4982 24768 bytes
SHA-256: 106c80f3add81502ea85e893b8d91214f5f968274c27c2b60e35c986fe162e95
font_01_sfnt_off00008209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8209 18880 bytes
SHA-256: cfbdee24d7402b99052158ce8ccd316620959aaec27a5d82eaae160d81e49f1b

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