Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a1795071e71661…

MALICIOUS

PDF

51.5 KB Created: 2021-06-09 17:04:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f7357adb91faba58df055cdf677de3d3 SHA-1: 08c8d87ced76452a247147a155db427b76c8b59b SHA-256: a0a1795071e716618928d2d096889c13205aae518f6c2a5ab0a93508783a787a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector domains that host lures for game hacks and free in-game currency. The document also exhibits characteristics of a credential phishing lure by asking for MFA confirmation. The embedded URLs and the nature of the lures suggest an attempt to trick users into visiting malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/hack-for-unboxing-simulator-on-roblox-game-hack In PDF document text
    • http://cintabaca.org/katalog//repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/original-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/tiktok-vs-free-fire_GM835599320.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53B1 24724 bytes
SHA-256: 01497394fc3ef2740601aef14dee12a135865d8b1f61357a80af4206c51480f6
font_01_sfnt_off00008bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFD 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off000095e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E1 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F3 19444 bytes
SHA-256: 5dcd96d8b2f5a267b06273e3321b58b28bfb76ce22dad7b4d877e58cb6d32412

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