Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1f61798b7158ea…

MALICIOUS

PDF

46.5 KB Created: 2021-06-04 04:42:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 53486e6d9b19a81a5e0a425282c2c7b6 SHA-1: acb4374c8ac6755321ef322a9e41ac1c303248d3 SHA-256: ec1f61798b7158ead318ce38de2490695961ba027d4aa440ad456becdec08b7f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs and a prominent link to a 'free generator / game hack' that is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to 'Coin Master Free Spins Hack' and the malicious URL, indicating a lure to entice users to click. The presence of a download button heuristic further supports the malicious intent of directing users to external, potentially harmful content.

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-free-spins-hack-without-human-verification-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-premium_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-no-verification-2021-android_GM431946152.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_off000050c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50C2 24092 bytes
SHA-256: 136270b3a4f69928eee28785be5f037b188e070129c2cf2a32a8ee8877c31dbd
font_01_sfnt_off00008786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8786 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9139 18952 bytes
SHA-256: bbe995309b6761320a89de429a491d1b27525b5c8b766f3497e3cab7bbe78ffa

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