Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a7acd9d538fe4d…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 14:23:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a8e3c4f273d94e0c54e8dd63d2864718 SHA-1: 48a4b70642fe0f8f68c08ede7a912cac0587c439 SHA-256: e1a7acd9d538fe4d5799ab62e5bc7215dae974a678632e4501dacfb3cdd42870
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to known malicious redirectors, specifically promoting game hacks and generators. The document body and heuristics indicate a lure for users to download potentially unwanted or malicious software. While no scripts were explicitly extracted, the nature of the links suggests a download or redirection to a second-stage payload.

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/479516143/minecraft-116-1-download-game-hack In PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-free-robux-with-a-code_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/is-it-true-you-can-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-promo-code-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-decal-id-free-robux_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_off00002ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED9 22076 bytes
SHA-256: f6ed545b670d48ddadf75ca479b619f615f6232cd0b3beb16e15f2d59655f69c
font_01_sfnt_off00005ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF3 18852 bytes
SHA-256: 4483e5b1b16afe4ffd26e41fedb821033deb29291bc0e6ac11589c4da06d798a

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