Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb6f74ede5964cd…

MALICIOUS

PDF

42.9 KB Created: 2021-05-14 03:01:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6ac76915b7960cc35d043490432b6105 SHA-1: 396554b78f043e6ce6f023fe424e3b03b324fb82 SHA-256: 1fb6f74ede5964cdf4d9b1f0e8a67a5fae66be8b5dd61b21b7d81821f69fd936
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains multiple links to known malicious redirectors and a large number of external PDF links, masquerading as game hacks and generators. The primary malicious link is https://netcdn.xyz/app/406889139/coin-master-gold-cards-free-game-hack, which is designed to lead users to potentially harmful content. The document body, though partially corrupted, contains similar lure text and URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-gold-cards-free-game-hack In PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/coin-game_GM406889139.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/get-more-robux_GM431946152.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://learning.mansatupadangpanjang.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-download_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_off00004c97.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C97 25900 bytes
SHA-256: 63cdbd5e8fa6ef71c762b75802f2e4fa744cc42a0cd9f7365b1fa1f23d4d4b98
font_01_sfnt_off0000866b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866B 17960 bytes
SHA-256: 5f0d383e38c54a4b706fba9e56337a6488be6196f7a5d6bfa1241f48271576e4

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