Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8663e616e98b8db…

MALICIOUS

PDF

43.9 KB Created: 2021-05-12 06:04:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 68b04237da1b349145f7ac03d0cd52e5 SHA-1: f44f6fa74b400573875b271c5b24a53e25843130 SHA-256: a8663e616e98b8db6b35134749ae34abdbfd1d6e02d3ef7399d4bce1aa55c4f6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'Coin Master Hack' and 'Roblox' related content. These links likely serve as a lure to download further malware or lead to phishing pages. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-2021-link-game-hack In PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/static-moonactive-net_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/roblox-help-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
stream_003_off00004b5b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5B 26356 bytes
SHA-256: 5ef5802c23bab2beb339c647ae2ad07f0b29f5a2cd76d4007375020316802fe2
font_01_sfnt_off000085ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AB 19444 bytes
SHA-256: cd7d042f017e29ed2c3577c1eafe7c90b8e93ad1b0ffe024495cb6450558cd34

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