Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f6c86d07961eba…

MALICIOUS

PDF

34.2 KB Created: 2021-06-26 19:46:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4a0891559c21d1dcb093c9424910bf54 SHA-1: 1433eb2cd38fc8309745ae4dc8c35510700f16c9 SHA-256: 67f6c86d07961eba9d6009d8978498553f570b556bab72bfe7ba2b5274fc1d6a
160 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'free Robux' and 'game hacks', directly linking to malicious redirector infrastructure. The primary URL, http://netcdn.co/app/431946152/como-tener-robux-gratis-sin-hacks-game-hack, is identified as part of a malicious redirector chain. The presence of embedded URLs and a visual download button lure further support the malicious intent of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/como-tener-robux-gratis-sin-hacks-game-hack In PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/2021-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/when-is-roblox-bloxburg-going-to-be-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-hacks-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/chef-free-tshirt-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-no-scam-or-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-prison-life-hacks-download_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-hack-wallhack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-robux-maps_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
font_00_sfnt_off00002f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F57 21984 bytes
SHA-256: 0a184a62678549cf9e014f0a789c79eb90df332569a770912b935d3975dc89ad
font_01_sfnt_off00006007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6007 19204 bytes
SHA-256: 5d9eaa7e916ee637f63fa8d2f3790bdc780b0f33e3534cbf7db4890f681ed309