Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8be78cd6fe4f50e…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 06:08:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b25206f63b5b1fc91bf8753a81d57ecf SHA-1: 273bb1f1de865a93825b4f704b6cece04515e7d8 SHA-256: b8be78cd6fe4f50e0b55a6ac9072270d3193b2534322ac7aaf89859ab4938ab4
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains and explicitly requests recovery secrets, indicating a phishing or credential harvesting attempt. The document body, though partially corrupted, suggests a lure related to game hacks and free currency. No scripts were extracted, but the presence of malicious links and the lure pattern strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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-daily-spins-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/no-scam-free-robux_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
font_00_sfnt_off00004fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDD 23788 bytes
SHA-256: 62716be999a958c6ed8f7214d3c47b8c4cf2dd1a894e21d920a5b1a8d723b10b
font_01_sfnt_off000085be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85BE 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00008f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F71 18308 bytes
SHA-256: 5c3cefeee4a209382fad51155f4ab19c665f35dca270fe96ae1b58d23c3d8f95

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