Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa80c189d9e4f3b5…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 22:57:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 164766f4d1c4804a0e3f98813f3cec05 SHA-1: bc235fa193c0f689d2772cde7cb6cc9635302c7e SHA-256: aa80c189d9e4f3b5d1f7cb0c01b6ff3079ed0d731c6b7bbcf7e0e93bfe4b0070
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to redirector infrastructure, specifically promoting 'free generator / game hack' lures. The presence of a fake CAPTCHA heuristic indicates an attempt to trick the user into interacting with the document, likely to execute a payload or visit a malicious site. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.online/app/406889139/coin-master-free-spins-and-coins-blogspot-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/pubg-300-uc-price-in-india_GM1330123889.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000517b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x517B 24668 bytes
SHA-256: ba60c117a6cdae2fb8134c63ed5bddb732fb563c7854634c47ff29da39518139
font_01_sfnt_off000089f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F5 2868 bytes
SHA-256: 00109425b76763440a5569341faade0445b3c9f8514523a6f287fddbc9082efe
font_02_sfnt_off000093e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E1 18636 bytes
SHA-256: 0f54115b9972647639797d248389657ce322f7c5c12f639c73d71ff235a73201

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