Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d21a1c65177471f…

MALICIOUS

PDF

33.0 KB Created: 2021-07-03 14:49:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 258e2f167d4b81da26763f152b63d6f2 SHA-1: 14c32f370192a0a0c905cbce9fe4bbe977eff327 SHA-256: 7d21a1c65177471f25771940f31f70986d9d78a91326eb9f4dfb8b02b9174f07
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and generators. The primary link, http://netcdn.tw/app/406889139/coin-master-hack-tool-ios-game-hack, is identified as a malicious redirector. The document's content and embedded links strongly suggest an attempt to trick the user into downloading a secondary malicious payload, likely malware, under the guise of a game cheat or hack.

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-tool-ios-game-hack In PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/pokemon-go-free-7-day-streak-rewards_GM1094591345.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/hey-google-show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/roblox-hacks-menu_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-robux-generator_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_off00002dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD6 22224 bytes
SHA-256: 70a9771b54deb55af0b5c6142e6018c2397f99feaf380f68db6dbea25b3c0a41
font_01_sfnt_off00005eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEA 18080 bytes
SHA-256: 60e2f1aba603b167dec75ea9e3630b58da9bf107e6826916583d8ce5e40519a9

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