Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29b196f7fac5028…

MALICIOUS

PDF

42.9 KB Created: 2021-05-13 18:37:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 15e65712e57f458c66e1a44eee760f36 SHA-1: b562ce8d904cba14f2a6b26580290f76e20d2995 SHA-256: a29b196f7fac5028d4ec78a902d3ba8de14cb2c5ce050bcd8b1f270e19e5d199
200 Risk Score

Malware Insights

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

The PDF file contains multiple links that impersonate Facebook and promise free game currency or hacks, redirecting users to malicious infrastructure. The ML classifier also flagged this PDF as malicious. The embedded links and the nature of the lure suggest a credential phishing or malware distribution attempt.

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/roblox-g-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/roblox-g-game-hack In PDF document text
    • http://ukrainiansofbuffalo.com/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/free-pet-treats-coin-master_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_off000048f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F5 27320 bytes
SHA-256: 4279167fc2eaac7d01ab5ae763b987ed05bde04b4fc7b7e6a89582b61aeff22e
font_01_sfnt_off000086a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A4 17784 bytes
SHA-256: 4bd2d0041dee7b7796a1d14ead449b1e4ac2afb962c20115eab39ba9eb76df9f

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