Malicious PDF — malware analysis report

Static analysis result for SHA-256 06aae4018673fab1…

MALICIOUS

PDF

44.8 KB Created: 2021-06-04 04:06:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8b724b6fffb5147620522d736f5aecb2 SHA-1: 66ccee7aae8248fd476068556b019c4a1834f3d3 SHA-256: 06aae4018673fab1c3ebdc56e504418d1c057dff73dcb6f5fdcf4b067b71e6a5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on them, disguised as "free generator / game hack" content. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/best-roblox-outfits-for-free-game-hack In PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/optifine-pe_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/50-000-free-spins-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
stream_004_off00004e5c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E5C 27496 bytes
SHA-256: 83519218a830f3480785583d617ea84cdf9cdabc53ca649324072275001bf3f7
font_01_sfnt_off00008c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C70 18312 bytes
SHA-256: 088c88f64ccf7ba0f6d0ab4f539eac23549e4c34e8305d9156b0424f04c8a0c8