Malicious PDF — malware analysis report

Static analysis result for SHA-256 234f2c59b3affd7e…

MALICIOUS

PDF

36.5 KB Created: 2021-07-04 21:35:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 813b1d3cd4cb51dd6e3cdc3e342f8b38 SHA-1: 9d6f78376c6039618cf025467236c6cd983c00ea SHA-256: 234f2c59b3affd7ed27b4b1b333aedc1b5f981370582cc204741199bd79674a0
160 Risk Score

Malware Insights

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

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising game hacks and cheats. The document body and embedded URLs reinforce this lure, suggesting the primary goal is to trick users into visiting these sites, which likely host further malicious content or exploit kits. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or malware distribution attempt.

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/406889139/coin-master-hack-mod-apk-unlimited-spin-download-game-hack In PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/get-free-robux-on-roblox-app_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/top-10-best-free-game-executors-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-hack-somebody-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-get-free-clothes-roblox-ipad_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-printable-roblox-pictures_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/cheat-engine-money-hack-roblox_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_off000034e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34E4 23260 bytes
SHA-256: e0788c1013631861df31d898fc1ebbaea4d493b64f904a2ea66f8590f0e9af98
font_01_sfnt_off00006923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6923 19208 bytes
SHA-256: 168ed34bac05dcfadb60f7a37d17c2e91e9de75542f03c32a69fdbfa53a2f5ea

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