Malicious PDF — malware analysis report

Static analysis result for SHA-256 38dd649b460a22ba…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 11:04:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 72e09eadaecb53d88d785129dbfbf1f1 SHA-1: 6b149d4abea90bac60c730a4144a708efa61e850 SHA-256: 38dd649b460a22ba3e71f62787cfc361e8e23771c19224f01b374b3b57e65cbe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as free game generators and hacks. The document body explicitly mentions 'free Minecraft coloring pages' and includes the malicious URL. This indicates a phishing or social engineering attempt to lure users to a site that likely hosts further malicious content or exploits. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence suggest a high likelihood of malicious intent.

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-coloring-pages-game-hack In PDF document text
    • https://ourlady-elearning.com/userfiles/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/hack-a-game_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-download_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-free-games-login_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-2021-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-free-online-no-installing_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-no-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/hack-de-roblox-para-atravesar-cosas-facil-hack_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/dansploit-hack-para-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-spins-generator-no-human-verification_GM406889139.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
font_00_sfnt_off00002f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F38 22440 bytes
SHA-256: ca1ea27da22ef1e2bee612b356277a769e8c7b8a557c8491a14777f09a257ae8
font_01_sfnt_off0000611b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611B 18224 bytes
SHA-256: 6e343a052bd34aead68fa90857bbbafbb2ebf9a3dc2705f241561e157218897d

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