Malicious PDF — malware analysis report

Static analysis result for SHA-256 396c9f77ff9fc60b…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 23:03:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c15636ad48b41c5ede70577a1e466346 SHA-1: e0d0b15a3721a5fd6cb6245a3c5582f09e1635eb SHA-256: 396c9f77ff9fc60bf8b4aff594f3aaab247198ef2793fb025950e6a20bbd5319
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and 'game hacks' to lure users. The heuristic firings confirm these links point to known malicious redirectors and a game hack lure. While no scripts were extracted, the embedded URLs and the nature of the lure suggest an attempt to lead the user to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/free-robux-with-no-verification-2021-game-hack In PDF document text
    • http://pustaka1.unindra.id/repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/where-to-get-robux_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_004_off00004c49.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C49 24448 bytes
SHA-256: 63e0096294a1b844a71277783017383594fabd865977586be587f871b89de87f
font_01_sfnt_off000083bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BD 19368 bytes
SHA-256: aac922b8691acc9aa277dffee065f580c863b50a75d1a5b8a64d6db85e21622d

Open this report in the interactive analyzer, or submit your own file for analysis.