Malicious PDF — malware analysis report

Static analysis result for SHA-256 435b6aac0982b4b5…

MALICIOUS

PDF

44.1 KB Created: 2021-05-17 07:30:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5c83a0052021ac3693eb17c02d7c5ecc SHA-1: 82e2ac7b183ebf1b1a291e8f80748ca600b0de0b SHA-256: 435b6aac0982b4b540f3d81069d98f93c22c06ca8032de8d3ef11ecdcb5addee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as 'free generators' or 'game hacks'. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-without-offers-game-hack, which is associated with known malicious redirectors. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/431946152/free-robux-without-offers-game-hack In PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/minecraft-free-education_GM479516143.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/how-can-you-get-free-robux_GM431946152.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
font_00_sfnt_off0000495e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x495E 27608 bytes
SHA-256: 71b93ac5c296d418e426839de725eab8b0cef6f753f04b8a5fba42ed294a39d5
font_01_sfnt_off00008959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8959 18600 bytes
SHA-256: aefc65dd28f007a3f9b16d2e7d3f040b6593358131967176ac90892bab7f0013

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