Malicious PDF — malware analysis report

Static analysis result for SHA-256 268b1435992b9f51…

MALICIOUS

PDF

44.9 KB Created: 2021-05-15 15:15:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0f7aef39f0aa5b7c120a260c77f64896 SHA-1: a98613c062140475c07799d677966e8777dec7cb SHA-256: 268b1435992b9f51b0f1bbd47d1dca1025a31cbccc22c5afd26b834a877af3ba
200 Risk Score

Malware Insights

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

The PDF contains multiple links that impersonate brands like Apple and promise game-related rewards, but redirect to known malicious infrastructure. The primary lure is a link to 'roblox-free-clothes-codes-game-hack' hosted on 'netcdn.xyz', which is flagged as a malicious redirector. While no scripts were extracted, the PDF structure and embedded links strongly suggest a credential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-free-clothes-codes-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-free-clothes-codes-game-hack In PDF document text
    • http://itc-nekretnine.hr/files/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/robux-generator-com_GM431946152.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_off00004b09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B09 28472 bytes
SHA-256: 1c36b36ef9a3b716beddb5d6c261be43cac1077946e19eebd4f80ba46f7189f5
font_01_sfnt_off00008cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD0 18392 bytes
SHA-256: d8b17fa3f29c5fc3b2ca0cecc93d61ab3a50b68dc1f93f0739daeae1c5528549

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