Malicious PDF — malware analysis report

Static analysis result for SHA-256 75912886d4d96025…

MALICIOUS

PDF

44.1 KB Created: 2021-06-04 03:26:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1f5504fa2448ef8e8da3517033033fe3 SHA-1: 681cb643d036ddaa43ac0b5f23c923968cb0c191 SHA-256: 75912886d4d9602572575f3f76a143089af7b364ba3e64141165e30e94810e30
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector. The document body and embedded links suggest a social engineering attempt to trick users into visiting potentially harmful websites. While no scripts were directly extracted, the PDF structure and link analysis indicate a malicious redirection workflow.

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/synapse-roblox-free-game-hack In PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-sued_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/bux-gg-robux-free_GM431946152.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_off00004f0b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F0B 25396 bytes
SHA-256: 66e59dc2ccdbbb24b347b4b4c7f4d79f7e76428d50144784ead070f2bb93d882
font_01_sfnt_off000088e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E6 18532 bytes
SHA-256: f2f65d939d1654862c473f31792bb3f0ee87d7638af2cc9574134150feb2cc2e

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