Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aafb9cc9d1a73a4…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 18:08:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 58015ee47aacc77b6f056cd07ef8a0e9 SHA-1: b573e8bbdc9997b33533b1310062d5bffe74bb29 SHA-256: 6aafb9cc9d1a73a4d29610669b520c2966dbdf1fa219e0be0d6633365d20e916
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 'free generators'. The primary redirector URL identified is http://netcdn.tw/app/479516143/minecraft-free-download-apk-softonic-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious sites, likely for malware download or credential harvesting.

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-free-download-apk-softonic-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-how-send-report-to-hacker_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/pokemon-go-free-app_GM1094591345.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/get-free-robux-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pokemon-go-free-and-pokeball-plus_GM1094591345.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_off0000366c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x366C 22380 bytes
SHA-256: 7c66a18123411b7378a0f956375594e099ff4084a3f7651586cb3ee7a7918788
font_01_sfnt_off000067de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67DE 18924 bytes
SHA-256: aed929b1c7b3cb84e23d484bb8a36e156d71bfa58a7e5a6631ce24cfbc00e5cd

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