Malicious PDF — malware analysis report

Static analysis result for SHA-256 0342a250886988b8…

MALICIOUS

PDF

45.0 KB Created: 2021-05-12 07:32:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5c4a6c372f68943e5fc0e649d44a5f7a SHA-1: ebdac7769bd8d0a6c6a9a48ed0993ac848ec43c5 SHA-256: 0342a250886988b8101452d8f711c80ef9a997ca14ba7a6176157e491aafe6ed
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, disguised as "game hacks" and "free generators". The document body explicitly requests recovery secrets and contains a call-to-action to download, indicating a phishing or credential harvesting attempt. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/406889139/coin-master-free-spin-whatsapp-group-game-hack In PDF document text
    • http://professionalpilottraining.com.au/images/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/20210-robux_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_003_off00004ceb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CEB 31112 bytes
SHA-256: 9e024b40786ef4f9c03d07e7c373a22928efa479aa247f422980426795dbaf94
font_01_sfnt_off00008d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D72 18392 bytes
SHA-256: 60a6361e6fc3388894d0b11e150a687c52e9f5db442fe66c80805b9ea3a4dad4

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