Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf3311c3669b1c1…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 09:42:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ef0089c2052f705a551a66ec6db8e965 SHA-1: ff506fda62d22b086ec89ed5366a4d0c0c2a375d SHA-256: ecf3311c3669b1c1659a97565d50d7e21bb28be956cd9535bbb199cd19a99ac1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a URL associated with malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure. The primary attack pattern involves tricking the user into visiting a malicious site under the guise of obtaining game-related benefits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/coin-master-heaven-free-spins-link-2021-game-hack In PDF document text
    • http://digilib.iailm.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-home_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-gifts_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_off00004cb0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CB0 25704 bytes
SHA-256: 8a4317036123c047bf2b3fc6e044916beff37b70d3540514766cae96af79db97
font_01_sfnt_off000087ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87BA 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000091a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A5 18572 bytes
SHA-256: 9953a6bcf7299cdc3f53a486839c0d2d9be693cd5b14fd285ca1faa973488d1b

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