Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a78354cf377b94…

MALICIOUS

PDF

33.9 KB Created: 2021-07-08 16:12:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ac53da92004f1a342cc7f64e36ed49fd SHA-1: a60d5b5977f1b574578af286f433e8459d9dc188 SHA-256: 00a78354cf377b94f797a88d736fbb46e2c0b6b5a6994f86fced71d62e59e67e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a primary redirector at http://netcdn.tw/app/431946152/free-roblox-toy-codes-game-hack. These links are presented as lures for 'free generators' or 'game hacks', indicating a social engineering tactic to trick users into navigating to potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

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.tw/app/431946152/free-roblox-toy-codes-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/como-consegir-robux-gratis-sin-hack-beteg_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/get-free-robux-and-tix-no-survey_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-pins_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-money-in-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-into-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-invisible-pants-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-no-download-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hacker-un-compte-sur-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-gift-card-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-kicked-by-server-cheat-engine_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-printable-roblox-birthday-invitations_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-email-en-cas-de-hack_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_off00002d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D9E 22408 bytes
SHA-256: f7a7dbca9b516db53c8143a5f5fc565dae366d000b2d234399d1f71979e607fe
font_01_sfnt_off00005f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7D 19004 bytes
SHA-256: 1ff580798b8255c0963ae009c059e6c806a9acd131ddedca225016f2881ecfe0