Malicious PDF — malware analysis report

Static analysis result for SHA-256 5211109b0d81e183…

MALICIOUS

PDF

41.8 KB Created: 2021-05-13 22:33:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b3e2149136a479b2f23408403ca429da SHA-1: a9c515e425661b2f20ddbd1a948322dc1b216c73 SHA-256: 5211109b0d81e1835554d4f39aac4843b52db8af56e8ffcde9bd9c87eb601053
220 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, including a known malicious redirector. The links are disguised as game hacks and generators, indicating a lure-based attack. The presence of a visual download button further supports the malicious intent of directing users to potentially harmful content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/coinmaster-rewards-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/xray-mod-minecraft-114_GM479516143.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_off00004986.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4986 24728 bytes
SHA-256: 30b37840309706ef9dd3b17707126edf5c0c835f7f349628f358ee272b52b5db
font_01_sfnt_off00008152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8152 18144 bytes
SHA-256: 3304910cf416930b47305d75e02d2266dd9cc93df9b4dcfa32843af2f30c9813

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