Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1404c3b2283f82…

MALICIOUS

PDF

49.6 KB Created: 2021-05-13 17:33:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 12cd44be7a439f567c296517e2753986 SHA-1: 6c8688a877d6c2d9f7890721ab4df08d9191b1f8 SHA-256: 6b1404c3b2283f82653ffd1c08d3c9ee8e66a6cb4dad29674983d09227e578ab
160 Risk Score

Malware Insights

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

The PDF contains links to known malicious redirectors, specifically advertising free game hacks and currency generators to lure victims. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious websites for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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/wahoogaming-co-free-robux-game-hack In PDF document text
    • http://www.kalaaliaraq.dk/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/app-master_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/roblox-executor-free_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
stream_003_off00004b3c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B3C 36608 bytes
SHA-256: 18f81b9d43e33920008fcf668217674182716e21016800073384c8484f4e9528
font_01_sfnt_off00009d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D39 19272 bytes
SHA-256: 78de909b7ffb92602eadaeed37aeb712efe7a44911c114e8956161378fc8ed7d

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