Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd3fafa0d39f48f…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 05:45:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c12cbaafa9e201b92004aac83f13f77c SHA-1: 8323936a12dc913307abdee39c8c4c81bae24ef5 SHA-256: 0bd3fafa0d39f48f1501f29002b034ffb06847d2fe5973a060c8cbf74d8caa42
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-hack-injection-game-hack, which is flagged as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting these sites, likely leading to further malware downloads or scams.

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/406889139/coin-master-hack-injection-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/cheats-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-thunami-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/are-there-any-obbies-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-roblox-game-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-the-game-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-online-robux-generator-no-download-no-survey_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
stream_002_off00002f1a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F1A 22608 bytes
SHA-256: 76f114d588a6dbe9dccbf549ecc9359024cff224b8d1f657ac0b540f70071056
font_01_sfnt_off0000615c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615C 18192 bytes
SHA-256: b1ce4aad51eab55aca347a921b79c2f8acd2a1fb99075b3acb5c5a3904d9a197

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