Malicious PDF — malware analysis report

Static analysis result for SHA-256 01873657c75ac3b4…

MALICIOUS

PDF

48.2 KB Created: 2021-06-08 23:20:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e37bc83cd226b79acd77407ca98c0304 SHA-1: 1936b6288b9918e69ca5e7fb21afcb4ebc7e5036 SHA-256: 01873657c75ac3b4d1fe12da6f09766119e6995bdaa5952e33f5c96c9c3b5fa8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a lure for free game currency, directing users to a known malicious redirector. The document's content and embedded links strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection is the primary goal.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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 https://netcdn.tw/app/431946152/free-robux-html-code-2021-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/pokemon-go-free-candy_GM1094591345.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-adopt-me-free-game_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-online-games-like-minecraft_GM479516143.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_004_off000052c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52C2 30528 bytes
SHA-256: 50462a7222638d9e2d4d62f25f0842ec926fe1dc0fd1292964ec6f284d1eaf42
font_01_sfnt_off000097f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97F9 19028 bytes
SHA-256: f8639cc56e976e1fc382719834a9f1aa7950344b46c204e0eb656d5b79cf3923

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