Malicious PDF — malware analysis report

Static analysis result for SHA-256 42974c6873d6f8f2…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 16:07:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: cb73408faba6cfa1e7ff077881a36f1e SHA-1: eb1a8f3a26f27303111e9996454eb4341ac1744d SHA-256: 42974c6873d6f8f2dc9aef6831c73fdfbee7b22667b581b17c7cab419a0a22f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free generators, directing users to a malicious redirector. The document contains multiple embedded URLs that likely lead to further malicious content or downloads. The ML classifier strongly indicated maliciousness, and the heuristics confirm the use of a redirector and a download button lure.

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-ios-mods-game-hack In PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-robux-java_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-robux-20210_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-robux-no-bc_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-tiktok-followers-without-human-verification-2021_GM835599320.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/hacked-by-blox-watch-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/roblox-rocitizens-hack-money_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/game-hack-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
font_00_sfnt_off000032d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D3 21848 bytes
SHA-256: e50fef4978f1572b42e976d78a2842cd4ef1b5882b76bea21d3266e4d895360c
font_01_sfnt_off0000626e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626E 18172 bytes
SHA-256: 56b22b05c6c29367c4c938ecbda02e8ba185ee7da968fb32465555374010e690

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