Malicious PDF — malware analysis report

Static analysis result for SHA-256 124fe2de74c350e5…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 13:56:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2b1f80080703520a80dfb59cda6818b1 SHA-1: a7a7b745911a88a06c06a99dea71e3a04662d51f SHA-256: 124fe2de74c350e5a8c0725ee992545d3b082dcf25c6a35ab2465ab3c4dcdbd9
220 Risk Score

Malware Insights

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

This PDF file contains multiple links to websites offering 'free generators' or 'hacks' for popular games, which is a common lure for phishing or malware distribution. The heuristic firings indicate that the PDF links to known malicious redirectors and is part of a link farm designed for SEO manipulation. The primary malicious URL identified is https://netcdn.online/app/406889139/coin-master-hack-no-human-verification-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • 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-hack-no-human-verification-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/tiktok-free-view-iphone-theme_GM835599320.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-on-computer-free_GM479516143.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_004_off0000516a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x516A 25464 bytes
SHA-256: 0feb782adee5665cd6bbe234fc3c4695db897752d63c4dae79b5c2217af88ab5
font_01_sfnt_off00008a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A38 18248 bytes
SHA-256: b53d611e96a32094425b068729023046bb1db9f19d10500fe1599e8fd30759af

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