Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ac74b955521f98…

MALICIOUS

PDF

44.3 KB Created: 2021-05-17 21:05:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 076ce5d13173108e7a08333d6f8ea2f1 SHA-1: 30fc07ab8732db87f42ad193f742ef6162634c40 SHA-256: e1ac74b955521f984a4c9ad4e0ed1530b19f326e849b64d411ed10964ec7b8dd
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that redirect to a 'free generator / game hack' lure, which is designed to trick users into a fake CAPTCHA or verification prompt. This behavior is indicative of a phishing or scam attempt, likely to lead to further malicious activity or credential harvesting. No scripts were extracted, but the presence of malicious redirectors and the fake CAPTCHA lure strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/431946152/free-robux-without-any-verification-game-hack In PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • http://www.shivintech.com/uploaded_files/userfiles/files/how-to-hack-coin-master-spin_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AFF 26676 bytes
SHA-256: 353370c0c759753a0cbc0ba659d934c3bb691e77f3f41b1365645ac3981035c2
font_01_sfnt_off00008868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8868 19144 bytes
SHA-256: f37955fcb4845292a10cf385cf7825d095aa25907e4328d2f78dbaed4e94b6f7

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