Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea3092a1e796c1b…

MALICIOUS

PDF

50.4 KB Created: 2021-05-11 18:37:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 976cd5efa99996d2711b824b61d1fa97 SHA-1: 0e574a351b1248669076241282dc718f36497f17 SHA-256: 1ea3092a1e796c1b8f0e7c1f4ddc2d696c0c121e4dec12fb94cd05a4c506ea61
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically advertising game hacks and cheats. The ML classifier also flagged this PDF as malicious. The presence of multiple links to potentially malicious domains suggests an attempt to lead the user to a site that may host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9349

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 https://netcdn.xyz/app/431946152/free-draw-roblox-game-hack In PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004845.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4845 27052 bytes
SHA-256: 3c7c56ec5d7018ec397a935a923eee85435aff76afb45e097088f16afc481963
font_01_sfnt_off000086df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DF 8252 bytes
SHA-256: 7ebedd6b182173c8e55836cb0d114b2c4a0ac85c96a51b9f0706c935f8415fea
font_02_sfnt_off0000a1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F4 18508 bytes
SHA-256: f910b5e05dc090141321478ad8f2371d3108a4bfaceab19230c4d52c6f4382ac

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