Malicious PDF — malware analysis report

Static analysis result for SHA-256 5066a23e412a575f…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 06:25:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 845e0b72ff6e5c1e56e341f16d9cf522 SHA-1: 60a969603939c38044cc879f41762b1c33ebbb6d SHA-256: 5066a23e412a575f07647a0b78380b089740dab17c6d32e7448be91196ed82d5
160 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to a URL associated with game hacks and free generators, which is a common lure for malicious downloads. The 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristics confirm this behavior. The ML classifier also flagged the PDF with high confidence. The document body, though partially garbled, contains the malicious URL, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/code-free-robux-game-hack In PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/pokemon-go-free-joystick-hack_GM1094591345.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-2021-robux-for-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_off00005179.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5179 26024 bytes
SHA-256: 707c7dd3d28278d999c3235817ad190aa7cc850b5f1af8f8f304d979ee4a4022
font_01_sfnt_off00008e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E75 18188 bytes
SHA-256: 00280273b0975bee0187bf1a1cc0e29ac13cf800f2976c84d5f4ba53341fee41

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