Malicious PDF — malware analysis report

Static analysis result for SHA-256 2597af99d7039fa4…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 03:53:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 580d0d2a1b1cb7037ce58f60131ee609 SHA-1: b46c2e8e629d9cbce841db028a648809f972aea3 SHA-256: 2597af99d7039fa46ba304efbd26afcc24238baef92965d591f9fd9e1f5ac058
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and external sites, masquerading as 'game hacks' and 'free currency generators' to lure victims. The heuristic firings indicate these links point to known malicious infrastructure and are designed to trick users into clicking them. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/406889139/coin-master-links-2021-game-hack In PDF document text
    • http://mb-alati.hr/files/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://www.mb-alati.hr/files/robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-robux-no-verification-no-download_GM431946152.pdfIn 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_off00005015.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5015 24652 bytes
SHA-256: 1d4415aac475294e645cdcbbcfa1b1e279243b67849115e7a7399c1fe35038e7
font_01_sfnt_off000087f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F0 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000091a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A2 18116 bytes
SHA-256: 6c2a50199d9b46215a875dc9668b69110360059bd5b64fd0f73058dd3f4c0f4e

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