Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37b6cce900a7d15…

MALICIOUS

PDF

43.2 KB Created: 2021-05-13 01:40:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 511e492218ea3f4c194badef19b21619 SHA-1: a842922a984cab9c0349bc4308bfb98141230a84 SHA-256: f37b6cce900a7d1582ab1aa77ee4eb839d899b7a8a1a9ce7060d4e6548a4711c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/you-promised-my-son-free-robux-game-hack PDF link annotation
    • http://algierimasonry.com/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://algierimasonry.com/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/link-coin-master_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/gain-robux_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-free-spins-link-2021-haktuts_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
font_00_sfnt_off000049c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49C4 25060 bytes
SHA-256: b9b17be70e5a3f6548262f5908dd61bad4426f2965392e68b2fecb902bbdadfd
font_01_sfnt_off000083ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83AB 19260 bytes
SHA-256: 86e86c6d1a3146e1f407edd8c9cf68c56566e4a3a2a05930f639aef478547eb3

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