Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4a7da3a2e77473…

MALICIOUS

PDF

43.0 KB Created: 2021-05-13 23:28:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a40799b49d163c2ff8b1f09f68b6471d SHA-1: 0b311722fa743ca6d8a144d1b9aefd61b177048a SHA-256: ee4a7da3a2e77473d4a35a653745abbc3cabbbc5c8960c1098cb2c37bea74442
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors and SEO link farms, all promoting game hacks and free currency. The document body and embedded links suggest a lure to trick users into visiting these sites, which likely host further malicious content or scams. The presence of multiple critical heuristics related to malicious redirectors and link farms strongly indicates a malicious intent to drive traffic to potentially harmful infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/479516143/minecraft-pe-hack-client-ios-game-hack In PDF document text
    • http://s-punkt-objects.de/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://s-punkt-objects.de/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://s-punkt-objects.de/images/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://s-punkt-objects.de/images/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://s-punkt-objects.de/images/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://s-punkt-objects.de/images/robux-game_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://s-punkt-objects.de/images/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://s-punkt-objects.de/images/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://s-punkt-objects.de/images/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://s-punkt-objects.de/images/roblox-rules_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/roblox-demon_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/how-to-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_off00004bac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BAC 26396 bytes
SHA-256: add25b48d1d7cb56d724c85e8e3b5364ac00c4f46922a8c5a53c841ebd03f038
stream_004_off00008667.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8667 18108 bytes
SHA-256: e50e7ffc92e693739b6a1d5d28be47030cd8670fbb45c47044b0ac4b43b5d3d6

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