Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea749694f7ada08…

MALICIOUS

PDF

42.3 KB Created: 2021-06-03 07:36:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ede306de92bd03a34ac83a19c2d7a2b1 SHA-1: c8a4e14e12ffd7f9a3dbf225da4817ae462d7705 SHA-256: 3ea749694f7ada08a543370be14ae409aa1539218548fd99adac92ebc5532dd5
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external sites, including a primary redirector disguised as a "game hack" generator. These links lead to a network of other PDF files, suggesting a link farm designed to lure users into downloading further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/kachifpro-game-hack In PDF document text
    • https://miraller.com/upload/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-2021_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/robux-converter_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e85.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E85 23652 bytes
SHA-256: fc6403e28da8cf0366c1d58ff90da742eca22f5d646871c1549a67bebc68cb9f
font_01_sfnt_off00008454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8454 17784 bytes
SHA-256: f5f16e9fe06415f99f9f196ec79e922628d3dac9c37f6a7894d79eeb781dffd0

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