Malicious PDF — malware analysis report

Static analysis result for SHA-256 864638b28c255e06…

MALICIOUS

PDF

43.7 KB Created: 2021-05-17 22:12:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c2c9a9800b39f76943a821abd8737e46 SHA-1: d694197a584458edea990f1a1f5b5c02af78ea2c SHA-256: 864638b28c255e06f4095734008c73e9332a6755463922d379bdcf8093d85306
200 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to trick users into interacting with malicious links. The primary link identified, https://netcdn.xyz/app/406889139/how-to-get-free-unlimited-coins-in-coin-master-game-hack, is associated with known malicious redirector infrastructure. The document's structure and embedded links suggest an attempt to deliver a second-stage payload or redirect the user to a phishing or malware-hosting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/406889139/how-to-get-free-unlimited-coins-in-coin-master-game-hack In PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/rbx-website_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/robux-money_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-master-hack-mod-apk-unlimited-spin-download_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_off00004d7f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D7F 25752 bytes
SHA-256: b5e4e4b95c7e85aad25b0b7983c49aef805ee5e2bee7d44f07f66055844f30b7
font_01_sfnt_off000087cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CB 18568 bytes
SHA-256: 17c3bfe6e2b09087d9b288dc5214e8ea6d8a39f73936503e3f6998c4d0212d6e

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