Malicious PDF — malware analysis report

Static analysis result for SHA-256 1efb24e905722bbd…

MALICIOUS

PDF

48.0 KB Created: 2021-06-04 03:13:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2c850767ece366b3d7f274838ea5685e SHA-1: 74086caa3ab4db8409eddca218655feeb9f957eb SHA-256: 1efb24e905722bbd3c0e524daf29c61f275b2c8bd36d0a963638ce7fd6194f81
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 'free generator / game hack' lures. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to direct users to potentially harmful content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/free-roblox-outfits-game-hack In PDF document text
    • http://digilib.iailm.ac.id/repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-client_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/robux-hack_GM431946152.pdfIn PDF document text
    • https://collectrobuxIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ff1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF1 28092 bytes
SHA-256: 1997740b0ede0dbe853a23f2c8e0f50f5a967a3fbb5e9cb902d3b40bcf90ddb4
font_01_sfnt_off00008e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E69 2984 bytes
SHA-256: a48876ea4c8ebf6e5aafed7b7988c43bbdc4f269aae7d16f65c21390373c25ca
font_02_sfnt_off000098b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B7 18312 bytes
SHA-256: 90da43312d6bb992ca5b038b2bc6e2b12c2c9d98bca064d3c60a0cee32c74c59

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