Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb78dbc13a4f14c…

MALICIOUS

PDF

35.4 KB Created: 2021-06-29 16:24:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8156de546ee719b84b4cf287cca5c9a0 SHA-1: abbe3df378b026762c98d500f42113121c40f111 SHA-256: bbb78dbc13a4f14cf6937fb4df02fc5ea8bc53173d53794bd6516a45747735f1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn serves further malicious PDF files. The document body and heuristics indicate a scam designed to lead 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/free-robux-generator-that-actually-works-game-hack In PDF document text
    • http://petrorang.com/admin-panel/products/images/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/pokemon-go-free-friends_GM1094591345.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/robux-game-com_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-coins-and-spins-coin-master-2021_GM406889139.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_off00003178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3178 22640 bytes
SHA-256: ac5c521f6e877607564e2197861d5f6f61ffa839fc564d2ffa12d308a7a9d845
font_01_sfnt_off000063e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E9 19608 bytes
SHA-256: 726d61eede8347b6d282163f3235af560aec736afec8bae684b23c093eac06cd

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