Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d11da2698861c2…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 18:14:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 13ddee72477df9f06cb658a585d75cfd SHA-1: 8086578603dd25ee3a9b5e8b820daa91656b2f65 SHA-256: 55d11da2698861c27e3a03a09c001dcdac7ff50275175f07269e5233d4de7687
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The primary lure, 'coin-master-hack-injection-game-hack', is hosted on a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for further malware delivery or credential harvesting.

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-injection-game-hack In PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/roblox-guess-that-song-cheat_GM431946152.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/roblox-robux-free-codes-android-s9_GM431946152.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://elearning.ic.sch.id/__statics/gudangsoal/files/free-robux-no-verification-at-all_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_off00002f7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F7D 22368 bytes
SHA-256: 3827f95eb0c4f951d71ead9dbeb71eade76736ea726aef38acb675def451fae2
font_01_sfnt_off00006129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6129 18192 bytes
SHA-256: b1ce4aad51eab55aca347a921b79c2f8acd2a1fb99075b3acb5c5a3904d9a197

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