Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8d4a8cd8f09fb7…

MALICIOUS

PDF

36.3 KB Created: 2021-07-05 09:02:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 349ca8975f7c5c945cb476a6aee98b5d SHA-1: c9a6647f1fd1e5cf3907597eff990cd545c11780 SHA-256: da8d4a8cd8f09fb75ebd781935eda1156585c98bc901a1fc2c90897eab52723d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The primary lure, 'Como Hackear Coin Master 2021', directs users to 'http://netcdn.tw/app/406889139/como-hackear-coin-master-2021-game-hack', which is flagged as malicious. This suggests a social engineering tactic to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/406889139/como-hackear-coin-master-2021-game-hack In PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/hack-boku-no-roblox-remastered_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-free-robux-2021-on-xbox_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/hack-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/generator-free-account-old-roblox_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/dragon-ball-final-stand-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/pubg-uc-on-discount_GM1330123889.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-hack-someones-minecraft-account_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_002_off000036d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36D2 22964 bytes
SHA-256: 360cdcad94d20a6d60f4bca36a316fb5444625f5c7ae66c3c78618255afb9879
font_01_sfnt_off00006a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A39 18664 bytes
SHA-256: edb2623ad104b8b86e5bc1c5ef1b50296b358dc4eff6a16b1f212eab3163f8bc

Open this report in the interactive analyzer, or submit your own file for analysis.