Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f03916fa263392…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 02:29:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 0d09f6da1d87903e9bf0faf271fa07df SHA-1: 55de7b394c59da3e59d10d967ca8042d7eb1ce8f SHA-256: c5f03916fa26339248808949817ff2860b438ee8e0bc09fa74b871ed2841ef79
160 Risk Score

Malware Insights

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

This PDF document employs a lure of free game hacks and generators to entice users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, suggesting a chain of malicious activity. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit user interest in gaming and lead them to potentially harmful content.

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/free-minecraft-pe-server-game-hack In PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-script-runner-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/elysian-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-no-human-veriy_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-no-games-needed_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/znac-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/roblox-rhythm-track-hack_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/roblox-plus-free_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-generator-no-verify_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-25-free-robux_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-no-anti-bot-verification_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_off0000322e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322E 22804 bytes
SHA-256: 9dd408af01b192f1622753d41c329232dc0e38c0645000c3cb66a1a3e5e3bbfc
font_01_sfnt_off000064d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D1 18124 bytes
SHA-256: 44cbab3028a3df9bc9841a4d80e53babf0d09cfa62fa83b1fc03cf8d1ca0a26e

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