Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4cd1fbf69fd84bc…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 14:54:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 003f4fe4bcd834919636499578cd7eb6 SHA-1: 3321d65fe460349f6838dee341b148f6814fb09c SHA-256: f4cd1fbf69fd84bcfac817f5bab1e0b9928e5b211e4655d007f68f261d3ffbdc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that promise game hacks and free currency. The ML classifier also flagged this PDF as malicious. The presence of these lures suggests an attempt to redirect the user to a site that may host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/406889139/how-to-get-to-village-3-in-coin-master-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-cheat_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/rbx-sites_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-spin-and-coins-links-2021_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e1e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E1E 24604 bytes
SHA-256: 301eb63295a6cb6c40e829c19aa30b589115424e5d732572ce0b2cc062773024
font_01_sfnt_off000085de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85DE 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00008fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC8 18380 bytes
SHA-256: 6ddb204371a6c8026f131d3c15a15b5243694b437d7423f9cb7584aef8c0bf44

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