Malicious PDF — malware analysis report

Static analysis result for SHA-256 7222ed5407d56f63…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 01:31:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: dd92facc1f7ba2fd68c36bfde1193ada SHA-1: 74435be325ae1196e732334dc324ea0839a974c6 SHA-256: 7222ed5407d56f635881f924ebc6f3a4b15a4d8788d36d6e8c8a9ff66688094e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free spins'. The document body and heuristics indicate a lure to download or access these fraudulent services. While no scripts were extracted, the PDF structure and embedded URLs strongly 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/coin-master-free-spins-youthnow-game-hack In PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/earn-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/robux-sign_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/flob-fun-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-com_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFD 23500 bytes
SHA-256: 825d11fe2289349abe8d5e4d2208403d1ae2692be5a119f0a64f7acc777caf48
font_01_sfnt_off0000650e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650E 18808 bytes
SHA-256: c55b3dffd290e9a0589896d87f4add06f602089722db7dbef51869cc81ac9e31

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