Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c36cc47d8efc61…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 22:31:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a705c1ea2bb2e7cadd1c4c5bc00854ad SHA-1: 5de4605e1d965badb1d707df721dcb44ae0c8f18 SHA-256: 59c36cc47d8efc61c009908bc536fd9d8e94242699fd98f0b09729bfa7ae23b5
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 and lures users with a 'game hack' theme, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and a visual download button indicates an effort to trick the user into clicking through to a malicious site. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious workflow, likely involving the exploitation of user trust to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/toolbox-for-minecraft-ios-game-hack In PDF document text
    • http://mbbs.hr/files/field-of-battle-roblox-hacks-full-lua_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/glitch-hack-roblox_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/catalog-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-robux-simple-and-easy_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-generator-download-no-surveys_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-robux-without-buying-it_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/free-minecraft-no-virus-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/tiktok-followers-free-no-verification_GM835599320.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/my-roblox-account-was-hacked-and-email-changed_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-free-robux-no-verification_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
font_00_sfnt_off00002f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F92 21980 bytes
SHA-256: 8b66299ef665f4d47a7f67163ab49361e04bcd22d52de312bb9137f1508e4a3f
font_01_sfnt_off00006012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6012 18440 bytes
SHA-256: 1f04f6f827e877cd67352bbda00ecfd0dc30e4046a1f8f0f93c71b20870d902f

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