Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e583a1d0cd4f055…

MALICIOUS

PDF

42.0 KB Created: 2021-06-03 22:04:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c1d2d79f3f45a3dd4439a0fe55d807c1 SHA-1: db348df4ff1a789968408e99b62199512cf4bd07 SHA-256: 5e583a1d0cd4f05517de8ebda93dc5720d8068828622777bfea35a0b8b2f72f4
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a common lure of free game hacks and followers to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, suggesting a phishing or scam campaign. While no scripts were directly extracted, the PDF structure and embedded links indicate a malicious workflow designed to lead users to potentially harmful content.

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/835599320/tiktok-followers-for-free-game-hack In PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pokemon-go-free-storage-upgrade_GM1094591345.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-followers-on-tiktok-fast_GM835599320.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/best-free-catalog-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-free-download-ipad_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_off00004cac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CAC 23912 bytes
SHA-256: 5481b0cb35e28d16664b26b8a57ea904b139c3a3e9d372506af7e9980e6c808d
font_01_sfnt_off0000834a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834A 17692 bytes
SHA-256: 1b1e1c30a9592b0fb91196253d93c27419259905b41c1e14a3654a7d7056ebb4

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