Malicious PDF — malware analysis report

Static analysis result for SHA-256 244e7e975181aba9…

MALICIOUS

PDF

41.8 KB Created: 2021-05-11 00:34:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c9c3abbdccdb8a2e9fb670413edfba66 SHA-1: 16139adf28e1c4d3bcd896fde78ea7d25352313b SHA-256: 244e7e975181aba920c88304bd7ffbb7a621b99af24a1b7470c1113c996dd2cc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that are flagged as malicious redirectors, specifically pointing to 'free generator / game hack' lures. The document body and embedded links suggest a social engineering attempt to trick users into visiting these malicious sites. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, which is a common technique for delivering further malicious content or leading users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-hack-without-root-game-hack In PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/mc-update_GM479516143.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/hack-to-get-free-spins-on-coin-master_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_003_off000048b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B8 25204 bytes
SHA-256: d8bf13f2a546cdeec06746dc8cac54e30ee5044df7d039070d69148a8dd76d01
font_01_sfnt_off00008107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8107 18220 bytes
SHA-256: 362aa068b196d4519c7cab909f91a3673cdf28c2147f03b6d737df4b2e6e708c

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