Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e48967047731fc…

MALICIOUS

PDF

48.8 KB Created: 2021-06-11 00:36:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0ea35176f342e7aec671ae102c31a7fe SHA-1: ecb611518504a9c33354bb275cb64b6333993482 SHA-256: 16e48967047731fcc4ee13f19471beaac6f747b62688143e38f88556f198dd2f
220 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free generators, impersonating Microsoft to trick users into clicking malicious links. The embedded URLs, including one pointing to a raw IP address and another to a known malicious redirector, are designed to lead users to potentially harmful content or downloads. The document's structure and content strongly suggest an attempt to exploit user interest in in-game items for credential phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 6

  • 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.tw/app/431946152/btools-hack-roblox-2021-download-game-hack.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.tw/app/431946152/btools-hack-roblox-2021-download-game-hack In PDF document text
    • http://110.232.83.89/slimsppks/repository/free-limiteds-roblox_GM431946152.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/free-robux-and-builders-club-microsoft_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-phone-number-verification_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005090.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5090 27456 bytes
SHA-256: 3ec63e16c124fb5409c53302fc065234e337fff6e812eef71eac551bc1579c30
font_01_sfnt_off00008d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D65 3500 bytes
SHA-256: e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634
font_02_sfnt_off00009906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9906 19192 bytes
SHA-256: b2211bc138812bf4ecc889af7eb921103df7dd32f320c625acdcac376ed199d6