Malicious PDF — malware analysis report

Static analysis result for SHA-256 51eeecdea13de5f5…

MALICIOUS

PDF

34.8 KB Created: 2021-07-08 18:10:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a10208772649314147688c7602470573 SHA-1: 6a76238ce958f375349906dc90a2251a08f21b64 SHA-256: 51eeecdea13de5f544455c4986fcb5c3b3c5d1e15c4734851786acff620ca88e
160 Risk Score

Malware Insights

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

The PDF contains a lure for free game currency and hacks, directing users to the URL http://netcdn.tw/app/406889139/free-spin-coin-master-game-game-hack. This URL is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document's content and embedded URL suggest a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-spin-coin-master-game-game-hack In PDF document text
    • https://www.alarqam.ae/userfiles/files/how-to-hack-roblox-accounts-with-inspect-element_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/how-to-get-free-robux-i-39_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-robux-oin-cata_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-robux-pastebin-no-wait-2021-may_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/block-best-robux_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-free-spins-generator-no-verification_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
font_00_sfnt_off000031b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B2 22788 bytes
SHA-256: f9f5187fd2912e4e406a47204844a44f0b575e593bfd72de4730d8a8c47e568c
font_01_sfnt_off000064d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D5 18432 bytes
SHA-256: 85223bd49af77d40a0092bd2c3733620e417d7d5fcdc632707b7c4feb3d04c0e

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