Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aaceb614b304757…

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 18:20:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 17bfd8848184bde3a1bf6cf6e4afac76 SHA-1: a191cd5c614b8d4eef2bd03619ef5c73ff8d0745 SHA-256: 7aaceb614b304757dfe3c2cc554eda0326f9190f57e16297e17e45ef10043d1b
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generator / game hack' lures. The document body, though partially corrupted, contains a URL that aligns with the heuristic findings. The presence of embedded URLs and the ML classifier's strong indication suggest a high likelihood of malicious intent, likely to lead the user to a site that exploits vulnerabilities or downloads further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/479516143/can-i-get-minecraft-windows-10-for-free-game-hack In PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-printables-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://youtuIn 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_004_off00005177.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5177 25732 bytes
SHA-256: 163d93c5f6265dac4eea5a6bc1d267754f5c020ac4db5d820be0adffca2ccd87
font_01_sfnt_off00008b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B59 2856 bytes
SHA-256: 20dc0c19885f9eb84a70adf762c7af2bb5b336981fcfa4d14a25b177438c211a
font_02_sfnt_off0000952e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x952E 18524 bytes
SHA-256: 6ac3bcb80c7412b4530c4d4c769bc132649d8002d05e49718f259242a5c40259

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