Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce1db2f897d7250…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 13:08:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8c8c8c5d32334c8d2cbc566c91f16f14 SHA-1: a5c7563ebfd34bdf43a170184b0b22e05758fba4 SHA-256: 0ce1db2f897d72505519d1b2e26cf67a3c5af59982caa4700eda2f6424ed22a2
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirectors and IP addresses hosting files related to game hacks and free currency generators, indicating a lure for potentially unwanted applications or malware. The document body contains obfuscated text and references to download URLs, suggesting an attempt to trick users into downloading malicious content. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.
  • 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.online/app/431946152/download-apps-for-robux-game-hack In PDF document text
    • http://183.91.70.7/repository/free-robux-codes-no-verification_GM431946152.pdfPDF link annotation
    • http://183.91.70.7/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/hack-a-game_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://183.91.70.7/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-free-spins-and-coins-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
stream_004_off00005245.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5245 30676 bytes
SHA-256: ce5d3562aa53d957db53f4f29c684deeeeb00b8e788e7c095ea581de6660d458
font_01_sfnt_off000098bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98BD 18996 bytes
SHA-256: ea235c61f7ee6ff97cb8e2e4b8381115f9ce59fc272e8f2939e83a9622de1179

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