Malicious PDF — malware analysis report

Static analysis result for SHA-256 d672f2b57eae8504…

MALICIOUS

PDF

36.2 KB Created: 2021-07-04 01:03:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6fe1287aea7d8db22a979d5157d05721 SHA-1: b2cfa6f537124f2229b015a01d0293c2c7841072 SHA-256: d672f2b57eae85040bea54845f2a1321a6b900b6d724aa2b498f39a1bac8c41d
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. The document body, though partially garbled, also contains this URL and references 'free spins' and 'game hack', reinforcing the lure. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the nature of the PDF and the embedded URL suggest it is designed to redirect users to a site that likely hosts a malicious payload, potentially exploiting client execution vulnerabilities.

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-daily-free-spins-blogspot-game-hack In PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/infinite-money-hack-roblox_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/core-exploit-v8-free-download-roblox_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/bux-life-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/robuxian-tutorials-free-robux-code-generator_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/hacks-for-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/roblox-cheat-no-key-required_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000035e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35E4 22972 bytes
SHA-256: 8ebe4d5e9681a99f1e7f442dd070fc66159ed3186f49f3a0df501a177f11388e
font_01_sfnt_off0000697f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697F 18812 bytes
SHA-256: 754165e748b1939f240fb960abb57fbe544f87d1813c38e81129662f3dc27bc1

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