Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e2356ea13e39aa…

MALICIOUS

PDF

41.9 KB Created: 2021-05-12 06:31:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: dca90b43cb019149d1a4530bd1ed807d SHA-1: 98a8dbc5661dd0a216a7d70f60cd7c4455e4d89d SHA-256: 38e2356ea13e39aac7c1350822ab3fc14e628f3a3376d11e3d80bc73ffd733b2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators'. The document body, though heavily obfuscated, contains references to these lures and the malicious URL. The presence of these links and the ML classifier's strong flagging indicate a high likelihood of malicious intent, likely to lead users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/hack-a-game-game-hack In PDF document text
    • http://grazianolangone.it/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://grazianolangone.it/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://grazianolangone.it/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://grazianolangone.it/images/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://grazianolangone.it/images/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://grazianolangone.it/images/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://grazianolangone.it/images/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • http://grazianolangone.it/images/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://grazianolangone.it/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://grazianolangone.it/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://grazianolangone.it/images/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://grazianolangone.it/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://grazianolangone.it/images/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://grazianolangone.it/images/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://grazianolangone.it/images/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://grazianolangone.it/images/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://grazianolangone.it/images/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://grazianolangone.it/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://grazianolangone.it/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://grazianolangone.it/images/how-to-actually-get-free-robux_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_003_off00004841.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4841 25168 bytes
SHA-256: dbf8d61fbd05dc984385298fe49fd9c0abb084831a549425887d30264782eb2a
font_01_sfnt_off000082c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C5 17856 bytes
SHA-256: 9fd96bc08588ed7ebb523c95e1e7ae68d4a51fb60fc2df2c843e3c05d3b8bc09

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