Malicious PDF — malware analysis report

Static analysis result for SHA-256 300abb6277311459…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 06:01:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: df809f254e4150c44f6062101392a5c4 SHA-1: 3f508393f15793bcf620d1b1934e80d47f67b420 SHA-256: 300abb62773114591b5129d66637cfb212d58b9ad7fabcaf7c9d8743115bae28
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/hack-coin-master-link-game-hack. The document body and heuristics indicate a lure for game hacks and generators, suggesting a social engineering attack. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure point towards a phishing or scam attempt, likely initiated via a spearphishing attachment.

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/hack-coin-master-link-game-hack In PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/mcpe-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/pubg-mobile-uc-2021_GM1330123889.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-space-outpost-tycoon-script-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-level-7-exploit-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hacks-for-mortem-metallum-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-no-human-verification-or-survey-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_off000033e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E9 23016 bytes
SHA-256: c0dc6ba6f16ef71ea727ed74ef9765216f6e42ad15545fba38399880e544feb4
font_01_sfnt_off000067b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B2 18004 bytes
SHA-256: 77a79d9ddfea7c891c19d69633f5c042251f7d3e3a2da65afb94a0c2eb318df4

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