Malicious PDF — malware analysis report

Static analysis result for SHA-256 196958a4a100d202…

MALICIOUS

PDF

41.6 KB Created: 2021-05-10 14:30:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9ccb2d605821de8b01b8d10791ca4bc1 SHA-1: 66a1ba515952b72342f64eebecd5a297c4fc75b8 SHA-256: 196958a4a100d202524c0f25fca5433e3d845b7b7930befb8334f44edfa161b6
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external sites, many of which are identified as malicious redirectors or part of a link farm. The document body and heuristics suggest a lure for free game hacks or generators, likely intended to trick users into visiting malicious sites. The presence of fake CAPTCHA elements further supports a social engineering attack pattern.

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/free-robux-accounts-game-hack In PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-get-more-free-coins-on-coin-master_GM406889139.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_off000045e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45E8 25228 bytes
SHA-256: 1013372fd50732d33ca3bd5ecf1d5dca18a0a1e1d18199bf0ffd556808a7d75f
font_01_sfnt_off000080cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CF 18120 bytes
SHA-256: ef72730342a71d63428e939ae8b3e53b657bfaebcd113dd5195284c27a8ef9c4

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