Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c63784272ad6bea…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 06:56:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ed2360628fa4ab042e4fca789f7ad860 SHA-1: 3487b34af83688f1779f7854764d3819150955b4 SHA-256: 5c63784272ad6beae612a9a2719a16b8c8fce7b56febaf3b208ae9b5e56d3359
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generators' or 'game hacks' for popular games. The primary lure URL is http://netcdn.co/app/431946152/free-card-giver-roblox-jailbreak-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs reinforce this lure by referencing game hacks and free items, aiming to trick users into clicking the malicious links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.co/app/431946152/free-card-giver-roblox-jailbreak-game-hack In PDF document text
    • http://mbbs.hr/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/rhs-money-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-a-free-keycard-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-speed-hack-in-roblox-without-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://mbbs.hr/files/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/como-hackear-roblox-y-tener-robux-gratis_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/can-you-go-to-jail-for-downloading-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-general-cheat-script_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-firebird-card-free_GM406889139.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_off00002e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2C 22624 bytes
SHA-256: b0566bba815599464ef5389e394b9906afa425f29129e9e2aee28f02e6bcce16
font_01_sfnt_off000060c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C6 19392 bytes
SHA-256: 97a421a2d6718266428589c1fcee1bdfb3fbb514ad0b83ce71aa42f6e0fc50c3

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