Malicious PDF — malware analysis report

Static analysis result for SHA-256 6627aef9ae095ace…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 10:50:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0c836f51dc8159ad0b7895312cee67b6 SHA-1: ccffd34ae6a2361dc05d396c9951a9c9a77fc9b7 SHA-256: 6627aef9ae095acefe7c2f6c4db75bb9ce3b2b1a730d9516966b5efb042def3b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-hack-ios-no-jailbreak-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs reinforce this theme, aiming to trick users into visiting potentially harmful sites.

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-ios-no-jailbreak-game-hack In PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-in-roblox-hoops_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/ill-be-free-online-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-no-scam-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-cheat-speed-legend-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/hacks-para-adopt-me-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-noob-clothes-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/well-hack-net-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-gift-card-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-roblox-with-cheat-engine-2021_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_off0000303a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303A 22784 bytes
SHA-256: c39aebc4eecd96e153c854be7e9db8eb7ae8b3586b0775dbf94d26f3e0f79416
font_01_sfnt_off000062d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D6 18404 bytes
SHA-256: 345b4b10f5918f406b1f79bf6dc118df3430b7a97c564e099ef402e5b5a3dc62

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